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  • Inorganic Chemistry  (1,462)
  • Industrial Chemistry
  • Seismology
  • 2000-2004  (152)
  • 1970-1974  (1,137)
  • 1950-1954
  • 1935-1939  (678)
  • 2001  (152)
  • 1971  (1,137)
  • 1938  (678)
Collection
Years
  • 2000-2004  (152)
  • 1970-1974  (1,137)
  • 1950-1954
  • 1935-1939  (678)
Year
  • 101
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    In:  Nature, Bonn, Pergamon, vol. 411, no. B8, pp. 462-466, pp. 1990, (ISBN: 0534351875, 2nd edition)
    Publication Date: 2001
    Keywords: Seismology ; Dynamic ; Stress ; Waves ; Earthquake
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  • 102
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    In:  J. Geophys. Res., Bonn, Pergamon, vol. 106, no. B8, pp. 16,253-16,264, pp. 1990, (ISBN: 0534351875, 2nd edition)
    Publication Date: 2001
    Keywords: Fracture ; Review article ; rate ; and ; state ; dependent ; Friction ; subcritical ; cracks and fractures (.NE. fracturing) ; Aftershocks ; Stress ; triggering ; oszillatory ; deformation ; cyclic ; fatigue ; 7209 ; Seismology ; Earthquake ; dynamics ; and ; mechanics ; 7223 ; Seismic ; hazard ; assessment ; and ; prediction ; 7260 ; Theory ; and ; modeling ; JGR
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  • 103
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    In:  Nature, vol. 410, no. 6824, pp. 74-77
    Publication Date: 2001
    Keywords: Seismology ; Strike-slip ; Plate tectonics ; Source parameters ; Ekstrom ; Ekstroem
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  • 104
    Publication Date: 2001
    Keywords: Seismology ; Fault plane solution, focal mechanism ; Stress ; Inversion ; Inhomogeneity ; P-waves ; JGR
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  • 105
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    In:  Tectonophys., Paris, Pergamon, vol. 338, no. 3-4, pp. 225-232, pp. 1246
    Publication Date: 2001
    Keywords: Earthquake precursor: prediction research ; Physical properties of rocks ; Seismology ; Dynamic ; Review article
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  • 106
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    In:  J. Geophys. Res., Roma, Publicazioni dell'Istituto Nazionale di Geofisica, vol. 106, no. B5, pp. 8699-8712, pp. B09304, (ISBN: 0-12-018847-3)
    Publication Date: 2001
    Keywords: Seismicity ; Earthquake hazard ; Source parameters ; Statistical investigations ; Italy ; Modelling ; 7215 ; Seismology ; Earthquake ; parameters ; 7223 ; Seismic ; hazard ; assessment ; and ; prediction ; 7260 ; Theory ; and ; modeling ; JGR
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  • 107
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    In:  Eos Trans. AGU, Münster, 3, vol. 82, no. 31, pp. 333 & 339, pp. B05407, (ISBN 0-471-26610-8)
    Publication Date: 2001
    Keywords: Seismology ; Borehole geophys. ; Instruments ; borehole ; seismometer ; Seismometer ; Long ; Valley ; ICDP ; SAF ; Nankai ; Chelungpu ; Taiwan ; high ; pressure ; high ; temperatures ; slim-hole ; Geoelectrics ; Geomagnetics ; Geochemistry ; fiber ; optics ; 0994 ; Exploration ; geophysics ; Instruments ; and ; techniques ; 7294 ; Seismology ; 8194 ; Tectonophysics
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  • 108
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    In:  Earth and Planetary Science Letters, University of Iceland, Icelandic Meteorological Office, Ministry for the Environment,, vol. 189, no. 3-4, pp. 115-131, pp. 1567, (ISBN: 0534351875, 2nd edition)
    Publication Date: 2001
    Keywords: Plate tectonics ; Subduction zone ; Seismology ; EPSL
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  • 109
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    In:  Geophys. Res. Lett., Charleston, South Carolina, California Division of Mines San Francisco, vol. 28, no. 2, pp. 371-374, pp. B11306, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Moment tensor ; Strong motions ; Aftershocks ; Earthquake ; Source parameters ; TUERK ; Turkey ; Oerguelue ; Orgulu ; 7215 ; Seismology ; Earthquake ; parameters ; 7230 ; Seismicity ; and ; seismotectonics ; GRL
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  • 110
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    In:  Journal of Seismology, Bonn, Inst. f. Theoret. Geodäsie, vol. 5, no. 1-2, pp. 269-276, pp. 1273, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Stress ; cracks and fractures (.NE. fracturing) ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Seismology ; Turkey ; NAF ; Fault zone ; Earthquake ; JOSE
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  • 111
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    In:  Journal of Seismology, Philadelphia, 4, vol. 5, no. 2, pp. 243-261, pp. 2061, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Location ; Seismology ; Error analysis ; Seismicity ; JOSE
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  • 112
    Publication Date: 2001
    Keywords: Seismology ; Strong motions ; Magnitude ; Location ; Attenuation ; Quality factor ; Source parameters ; Earthquake hazard ; GJI
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  • 113
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    In:  Pageoph, Darmstadt, Wissenschaftliche Buchgesellschaft, vol. 158, no. 1-2, pp. 319-347, pp. L11308, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismology ; Location ; Modelling ; Three dimensional ; Nuclear explosion ; PAG
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  • 114
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    In:  Geophys. J. Int., Amsterdam, Univ. of Tokyo, vol. 144, no. 3, pp. 647-655, pp. 1489, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismology ; Radiation pattern ; Green's function ; Fault plane solution, focal mechanism ; Iceland ; Iran ; Inversion ; Earthquake ; GJI
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  • 115
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    In:  J. Geophys. Res., Veldhoven, Kluwer, vol. 106, no. B8, pp. 16339-16356, pp. L01308, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismology ; Source ; Inversion ; nokms ; 1208 ; Geodesy ; and ; Gravity: ; Crustal ; movements--intraplate ; (8110) ; 3210 ; Mathematical ; Geophysics: ; Modeling ; 8110 ; Tectonophysics: ; Continental ; tectonics--general ; (0905) ; 8150 ; Plate ; boundary--general ; (3040) ; Vavrycuk ; JGR
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  • 116
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    In:  Geophys. Res. Lett., Köln, Elsevier, vol. 28, no. 6, pp. 1079-1082, pp. B02401, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Geodesy ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; InSAR ; Earthquake ; Turkey ; NAF ; Source parameters ; 1242 ; Geodesy ; and ; gravity ; Seismic ; deformations ; (7205) ; 7205 ; Seismology ; Continental ; crust ; (1242) ; 7215 ; Earthquake ; parameters ; 7230 ; Seismicity ; and ; seismotectonics ; GRL ; FROTH ; (preprint) ; GHILLERS ; PDF
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  • 117
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    Oregon State University Press
    In:  J. Geophys. Res., Corvallis, x + 406 pp., Oregon State University Press, vol. 101, no. B6, pp. 5847-5854, pp. B06310, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: NOK ; 7223 ; Seismology ; Seismic ; hazard ; assessment ; and ; prediction ; 1734 ; History ; of ; geophysics ; 7299 ; General ; or ; miscellaneous ; 9910 ; Corrections ; Books
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  • 118
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    In:  J. Geophys. Res., Stockholm, 3-4, vol. 106, no. B2, pp. 2167-2176, pp. L17317, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Correlation ; Seismicity ; critical ; point ; concept, ; power ; law ; time-to-failure ; relation ; seismic Moment ; release ; Stress ; Statistical investigations ; 7209 ; Seismology ; Earthquake ; dynamics ; and ; mechanics ; 7223 ; Seismic ; hazard ; assessment ; and ; prediction ; 7260 ; Theory ; and ; modeling ; JGR ; Zoeller ; Zoller
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  • 119
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    Cambridge Univ. Press, 713 pp.
    In:  Prague, 214 pp., Cambridge Univ. Press, 713 pp., vol. 42, no. 3, pp. 275-291, (0-596-00648-9, 3rd edition 2005. XXII, 509 pp.)
    Publication Date: 2001
    Keywords: Waves ; Textbook of geophysics ; Wave propagation ; Seismics (controlled source seismology) ; Seismology ; Ray seismics ; Ray tracing ; GJI ; Cerveny
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  • 120
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    In:  J. Geophys. Res., Charleston, South Carolina, California Division of Mines San Francisco, vol. 106, no. B5, pp. 8729-8744, pp. L10305, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismicity ; Statistical investigations ; Earthquake hazard ; ETAS ; epidemic ; type ; Aftershocks ; sequences, ; Modelling ; Omori ; 3210 ; Mathematical ; geophysics ; Modeling ; 7200 ; Seismology ; 7223 ; Seismic ; hazard ; assessment ; and ; prediction ; 7230 ; Seismicity ; and ; seismotectonics ; JGR
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  • 121
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    In:  Pageoph, Philadelphia, 4, vol. 158, no. 4, pp. 695-715, pp. 2061, (ISSN: 1340-4202)
    Publication Date: 2001
    Description: Abstract Thirty-three earthquakes occurred in Central Apennines (Italy) with Ml ranging from 2.4 to 3.7 have been spectrally analysed using digital recordings from twelve stations of the Rete Sismometrica Marchigiana (RSM) network. Data corrected for geometrical spreading and quality factor Q have been inverted by means of the Generalised Inversion Technique. Site responses have been compared with those obtained by H/V ratio. Site amplifications have been observed both at stations placed on Pleistocene sediments and at one station located at 1800 m of altitude. Source parameters have been calculated by fitting the spectra with an automatic procedure adopting the w2 source model. The seismic moments range from 9.23*10^19 to 4.28*10^21 dyne-cm with average Mo (S) to Mo (P) ratio of 1.13 plus minus 0.38. The stress drops are generally low and they vary between 1.1 and 10.2 bar when estimated by using S source spectra, and between 0.5 and 7.1 bar when the P source spectra are fitted. For the considered range of seismic moments we observe that the stress drop does not have significant dependence on event size.
    Keywords: Seismology ; Site amplification ; Source parameters ; generalised ; Inversion ; H/V-ratio ; site ; effects ; Nakamura
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  • 122
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    In:  Geophys. Res. Lett., Basle, Wiley, vol. 28, no. 17, pp. 3341-3344, pp. 1264, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; InSAR ; SAR ; Geodesy ; Earthquake ; 1243 ; Geodesy ; and ; gravity ; Space ; geodetic ; surveys ; 7230 ; Seismology ; Seismicity ; and ; seismotectonics ; 8010 ; Structural ; geology ; (new ; field, ; replaces ; single ; entry ; 8165) ; Fractures ; and ; faults ; 8040 ; Remote ; sensing ; GRL ; Arnadottir
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  • 123
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    In:  Geophys. Res. Lett., Jena, Scientific American, vol. 28, no. 19, pp. 3729-3732, pp. L05301, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Earthquake ; Subduction zone ; USA ; Earthquake hazard ; Seismicity ; 7200 ; Seismology ; 7215 ; Earthquake ; parameters ; 7223 ; Seismic ; hazard ; assessment ; and ; prediction ; 7230 ; Seismicity ; and ; seismotectonics ; GRL
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  • 124
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    In:  Phys. Earth Plan. Int., Roma, Polish Geothermal Association, vol. 123, no. 2-4, pp. 247-266, pp. B09303, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Location ; Seismology ; Error analysis ; Modelling ; PEPI
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  • 125
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    In:  Journal of Volcanology and Geothermal Research, Leyden, Noordhoff International Publishing, vol. 106, no. 1-2, pp. 123-143, pp. B04306, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismology ; Source ; Volcanology ; Seismicity
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  • 126
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    In:  Geophysical Research Letters, London, AGU, vol. 28, no. 22, pp. 4323-4326, pp. B02408, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismicity ; Statistical investigations ; cluster ; Hypocentral depth ; USA ; GRL ; 3220 ; Mathematical ; geophysics ; (new ; field) ; Nonlinear ; dynamics ; 7215 ; Seismology ; Earthquake ; parameters
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  • 127
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    In:  Bull. Seism. Soc. Am., Taipei, EGS, vol. 91, no. 3, pp. 499-510, pp. 2187, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Horizontal to vertical spectral ratio ; Nakamura ; Spectrum ; NOISE ; Site amplification ; Micro-tremor (seismic noise) ; Earthquake engineering, engineering seismology ; Borehole geophys. ; Seismology ; BSSA
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  • 128
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    In:  Pageoph, Frankfurt, Peter Lang, vol. 158, no. 1-2, pp. 259-276, pp. 2151, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismology ; Location ; Three component data ; Wave form analysis ; Nuclear explosion ; PAG
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  • 129
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    In:  Geophys. J. Int., Taipei, AGU, vol. 145, no. 3, pp. 579-592, pp. 1470, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Scattering ; Seismology ; Coda (waves, ~ of seismograms) ; Volcanology ; Absorption ; Luehr ; Luhr ; GJI
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  • 130
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    In:  Geophys. Res. Lett., Kunming, China, D. Reidel Publishing Company, vol. 28, no. 20, pp. 3999-4002, pp. 1058, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismicity ; Stress ; Statistical investigations ; Pacific ; 1255 ; Geodesy ; and ; gravity ; TIDES ; (4560) ; 3035 ; Marine ; geology ; and ; geophysics ; mid-ocean ; ridge ; processes ; 7209 ; Seismology ; Earthquake ; dynamics ; and ; mechanics ; 7220 ; Oceanic ; crust ; GRL
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  • 131
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    In:  Eos, Trans., Am. Geophys. Un. Trans. AGU, Kunming, China, 3-4, vol. 82, no. 26, pp. 285, 290 & 291, pp. 2180, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Earthquake ; Tsunami(s) ; Portugal ; history ; Seismology ; Source parameters
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  • 132
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    Elsevier Science
    In:  München, Elsevier Science, vol. 34, no. 1, pp. 65-66, (ISBN: 3-528-02574-3)
    Publication Date: 2001
    Keywords: Handbook of geophysics ; Handbook of physics ; Handbook of engineering ; Handbook of informatics ; Seismology ; Earthquake precursor: prediction research ; comets ; Chaotic behaviour ; Source ; Plate tectonics ; Elasticity ; compilers ; earth Core ; earth mantle ; Acoustics ; Earthquake engineering, engineering seismology ; history ; Rock mechanics ; Artificial intelligence (AI) ; mathematics ; Geochemistry ; Fracture ; fatigue ; FractureT ; Geodesy ; Geomagnetics ; Statistical investigations ; Geothermics ; Global Positioning System ; Green's function ; Fluids ; ConvolutionE ; plumes ; Mineralogy ; Modelling ; Tectonics ; SOC ; percolation ; Oceanography ; Planetology ; MOON ; SAR ; InSAR ; Stress ; Tsunami(s) ; Volcanology ; Whitman ; Rikitake ; Stein ; Oreskes ; Loper ; Jeanloz ; Lee ; Mandelbrot ; Vanicek ; Bock ; Olson ; Campbell ; Madariaga ; Staufer ; Dickinson ; van ; Zyl ; Zoback ; Turcotte ; Ward ; Sigurdsson
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  • 133
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    In:  Geophys. J. Int., Bonn, Inst. f. Theoret. Geodäsie, vol. 146, no. 3, pp. 747-759, pp. 1273, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Stress ; Structural geology ; Seismology ; GJI
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  • 134
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    In:  Geophys. Res. Lett., Basle, Wiley, vol. 28, no. 3, pp. 435-438, pp. B09404, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Fault zone ; Creep observations and analysis ; Earth tides ; 1249 ; Geodesy ; and ; gravity ; Tides ; Earth ; 7209 ; Seismology ; Earthquake ; dynamics ; and ; mechanics ; 7223 ; Seismic ; hazard ; assessment ; and ; prediction ; 8123 ; Tectonophysics ; Dynamics, ; seismotectonics ; GRL
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  • 135
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    In:  J. Geophys. Res., Prague, Wiley, vol. 106, no. B11, pp. 26,467-26,482, pp. B09404, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismology ; Modelling ; Strong motions ; Fracture ; Synthetic seismograms ; Green ; Inversion ; Stress ; JGR
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  • 136
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    In:  Bull. Seism. Soc. Am., Stockholm, Wissenschaftliche Buchgesellschaft, vol. 91, no. 6, pp. 1924-1929, pp. 1397, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Surface waves ; Wave propagation ; Synthetic seismograms ; Modelling ; Seismology ; BSSA ; SRICHWALSKI
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  • 137
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    In:  Scientific American, Jena, Scientific American, vol. 9, no. 12, pp. -, pp. RG4001, 29 pp., (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: politics ; Nuclear explosion ; Seismology ; SciAm
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  • 138
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    In:  J. Geophys. Res., Luxembourg, National Academy of Sciences of the USA, vol. 106, no. B3, pp. 4141- 4154, pp. B05311, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: P-waves ; Attenuation ; Earthquake ; Japan ; JGR ; 7200 ; Seismology ; 7215 ; Earthquake ; parameters ; 8180 ; Tectonophysics ; Tomography
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  • 139
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    In:  Pageoph, Luxembourg, Lawrence Livermore National Laboratory, vol. 158, no. 1-2, pp. 7-18, pp. B05311, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismology ; Location ; Nuclear explosion ; PAG
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  • 140
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    In:  Earth planet. Sci. Lett., Tokyo, Lawrence Livermore National Laboratory, vol. 186, no. 1, pp. 7-14, pp. L18610, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Plate tectonics ; hot ; spot ; Volcanology ; TOME ; Seismology ; Electromagnetic methods/phenomena
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  • 141
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    In:  Eos, Trans., Am. Geophys. Un., Tokyo, Lawrence Livermore National Laboratory, vol. 82, no. 20, pp. 224, pp. L18610, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismology ; Seismometer ; Gravimetry, Gravitation ; 1700 ; History ; of ; geophysics ; 1734 ; Seismology ; 6605 ; Public ; issues ; Education ; Goettingen ; Gottingen
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  • 142
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    In:  Geophys. Res. Lett., Washington, D.C., AGU, vol. 28, no. 17, pp. 3381-3384, pp. 1489, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Stress ; Earthquake ; Seismology ; 7209 ; Seismology ; Earthquake ; dynamics ; and ; mechanics ; 7212 ; Earthquake ; ground ; motions ; and ; engineering ; 7223 ; Seismic ; hazard ; assessment ; and ; prediction ; 7260 ; Theory ; and ; modeling ; GRL
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  • 143
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    In:  Pure and Applied Geophysics, Minsk, Polish Geothermal Association, vol. 158, no. 5, pp. 1737-1761, pp. TC5003, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Coda (waves, ~ of seismograms) ; Attenuation ; Quality factor ; Source parameters ; Seismology ; Qc ; PAG
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  • 144
    Publication Date: 2001
    Keywords: Seismology ; Teleseismic events ; Earthquake ; Source time function ; Fault plane solution, focal mechanism ; seismic Moment ; Body waves ; Source ; NAF ; Waves ; form ; analysis ; GJI ; Duezce ; Duzce ; Zuenbuel ; Zunbul ; Karakisa ; HGROSSER
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  • 145
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    In:  Geophysical Research Letters, Warszawa, AGU, vol. 28, no. 22, pp. 4311-4314, pp. 2133, (ISSN: 1340-4202)
    Publication Date: 2001
    Description: Tibi et al. investigate the source process of the deep 1995 Mariana main shock using broadband data from global seismic stations. They relocate its aftershocks by combining teleseismic arrival times with arrival times from a local network operating directly above the event in the Mariana islands. The main shock ruptured downwards across the entire width of the active slab, with a rupture length of 20 km and rupture velocity of 4 km/s. Most of the aftershocks occurred along or very near the main shock fault plane, as is observed for shallow earthquakes. The characteristics of this event are also consistent with the idea that large deep earthquakes from cold slabs tend to have high aftershock activity, low stress drop, high seismic efficiency and high rupture velocity. The mechanism of deep focus earthquakes remains controversial, and such observations are critical in providing constraints on proposed mechanisms.
    Keywords: Earthquake ; Aftershocks ; Source ; Subduction zone ; GRL ; 7209 ; Seismology ; Earthquake ; dynamics ; and ; mechanics ; 7215 ; Earthquake ; parameters
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  • 146
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    In:  Journal of Volcanology and Geothermal Research, Taipei, AGU, vol. 110, no. 1-2, pp. 57-77, pp. B06304, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Hypocentral depth ; Location ; Volcanology ; Induced seismicity ; Seismology ; Coherency ; Data analysis / ~ processing ; JVGR
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  • 147
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    In:  Geophys. Res. Lett., Reykjavík, Icelandic Meteorological Office, Ministry for the Environment, University of Iceland, vol. 28, no. 18, pp. 3537-3540, pp. L05306, (ISSN: 1340-4202)
    Publication Date: 2001
    Description: Using a local recurrence time method for earthquakes along the Hayward fault, Wyss maps locked and unlocked patches, and compares them with the results of models from surface creep and geodetic measurements. The author reports that, in general, the observational and model data for the central and southern segments of the fault are in good agreement. However, there are indications from short local recurrence times in the northern segment of an asperity in this region that could result in a M6.5 event.
    Keywords: Fault zone ; Creep observations and analysis ; Seismicity ; Rheology ; 1208 ; Geodesy ; and ; gravity ; Crustal ; movements ; intraplate ; (8110) ; 7230 ; Seismology ; Seismicity ; and ; seismotectonics ; GRL
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  • 148
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    In:  Geophys. Res. Lett., Taipei, 3-4, vol. 28, no. 15, pp. 3007-3010, pp. 1429, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Stress ; Coulomb ; Earthquake ; Inelastic ; Rheology ; Modelling ; Seismicity ; Aftershocks ; Earthquake hazard ; Seismology ; 7205 ; Seismology ; Continental ; crust ; (1242) ; 7223 ; Seismic ; hazard ; assessment ; and ; prediction ; 7230 ; Seismicity ; and ; seismotectonics ; 7260 ; Theory ; and ; modeling ; GRL
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  • 149
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    In:  Bull. Seism. Soc. Am., Taipei, 3-4, vol. 91, no. 5, pp. 1088-1098, pp. 1429, (ISSN: 1340-4202)
    Publication Date: 2001
    Keywords: Seismology ; Source ; Synthetic seismograms ; Modelling ; Inversion ; BSSA ; China
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  • 150
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    In:  Pageoph, Zagreb, Conseil de l'Europe, vol. 158, no. 1-2, pp. 129-141, pp. L12S01, (ISSN 0343-5164)
    Publication Date: 2001
    Keywords: Seismology ; Location ; Seismic networks ; Nuclear explosion ; PAG
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  • 151
    Publication Date: 2001
    Keywords: Source ; Seismology ; Earthquake ; Strong motions ; 7200 ; Seismology ; 7215 ; Earthquake ; parameters ; 7230 ; Seismicity ; seismotectonics ; 9350 ; North ; America ; GRL
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  • 152
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    GFZ
    In:  Project proposal, TU Braunschweig, GFZ, vol. 10, no. 13, pp. 1431-1434, (ISBN 0 08 042822 3)
    Publication Date: 2001
    Keywords: Project report/description ; Turkey ; GFZ ; private ; communication ; Earthquake precursor: prediction research ; Earthquake hazard ; Seismology ; Seismic networks ; Global Positioning System ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; InSAR ; hydrology ; Radon ; Geochemistry ; Strong motions ; proposal ; draft
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  • 153
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    Berichte der deutschen chemischen Gesellschaft 104 (1971) 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 154
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 21-30 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Diastereomers of Nonactin Acid and Epimers of 2-Desmethylnonactin AcidNonactin acid 8a was prepared in only four reaction steps starting from the furan 3a. - In an attempt to prepare nonactin acid by intramolecular cyclisation of 13, the tetrahydropyran 15 was obtained in addition to the desired tetrahydrofuran 14. Treatment of 14 + 15 with sodium cyanide under the conditions of the Kolbe reaction led to the formation of the isomeric acids 16 + 17.
    Notes: Ausgehend von dem Furan 3a gelangt man in vier Reaktionsschritten zur Nonactinsäure 8a, einem 2.5-disubstituierten Tetrahydrofuran. - Beim Versuch der Darstellung von Nonactinsäure durch intramolekulare Cyclisierung von 13 entstand neben dem gewünschten Tetrahydrofuran 14 durch Ringerweiterung auch das Tetrahydropyran 15. Die Umwandlung von 14 + 15 mit Natriumcyanid nach Kolbe führte zu den stellungsisomeren Säuren 16 + 17.
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  • 155
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 40-49 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aromatic Solvent Induced Shifts (ASIS) in the N.M.R. Spectra of tert-Butyl-, tert-Butoxy-and Nitro(tert-butyl)benzene DerivativesThe n.m.r. spectra of aromatic tert-butyl and tert-butoxy groups which are not separated in CCl4 may always be resolved in benzene and pyridine solution. In some cases (e. g. 15) assignements for these signals are obtained empirically from their solvent shifts. The signals of the aromatic protons in 2.6- and 3.4-dinitro-1-tert-butylbenzene show remarkable solvent effects (CCl4→C6D6) which cannot be explained by the 1:1 complex models. The shifts induced by aromatic solvents must originate rather from the time average over all orientations of the anisotropic molecules in the nearest solvent schell. The interpretation of such solvent shifts should be based on values derived from an absolute standard.
    Notes: In CCl4 nicht getrennte NMR-Signale für aromatisch gebundene tert.-Butyl- und tert.-Butyloxygruppen werden in Benzol und Pyridin stets aufgelöst und können in bestimmten Fällen (z. B. 15) an Hand der Lösungsmittelabhängigkeit empirisch zugeordnet werden. Die Ringprotonensignale bei 2.6- und 3.4-Dinitro-1-tert.-butyl-benzol zeigen beim Lösungsmittelwechsel CCl4→C6D6 sehr unterschiedliche und z. T. sehr starke Verschiebungen, die nicht mit dem Modell spezifischer 1:1-Komplexe erklärt werden können. Die Wirkung des aromatischen Lösungsmittels muß vielmehr durch das Zeitmittel über alle Orientierungen aller anisotroper Moleküle in der engsten Solvathülle zustandekommen. Auf die Verwendung eines absoluten Standards bei der Deutung von Lösungsmitteleffekten in der NMR-Spektroskopie wird hingewiesen.
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  • 156
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 473-478 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of 7-β-Neohesperidosyl-4′-(β-D-glucopyranosyl)naringenin, a Flavanone Triglycoside from Citrus FruitsThe glycoside 7-β-neohesperidosyl-4′-(β-D-glucopyranosyl)naringenin (3), isolated from the segments of Citrus paradisi Macf, by Mizelle et al., was synthesized by condensation of phloracetophenone 4-β-neohesperidoside (1) with 4-hydroxybenzaldehyde 4-β-D-glucopyranoside (2) and by cyclisation of the resulting chalkone glykoside. Dehydrogenation of the flavanone triglykoside undecaacetate and subsequent saponification leads to the formation of 7-β-neohesperidosyl-4′-(β-D-glucopyranosyl)apigenin (7), the first synthetic apigenin triglycoside.
    Notes: Das von Mizelle und Mitarbb. aus Citrus paradisi Macf. isolierte 7-β-Neohesperidosyl-4′-β-D-glucopyranosyl-naringenin (3) wurde durch Kondensation von Phloracetophenon-4-β-neohesperidosid (1) mit 4-Hydroxy-benzaldehyd-4-β-D-glucopyranosid (2) und Cyclisierung des entstandenen Chalkonglykosids synthetisiert. Durch Dehydrierung des Flavanontriglykosid-undecaacetats (3a) wurde nach Verseifen das 7-β-Neohesperidosyl-4′-β-D-glucopyranosyl-apigenin (7) als erstes synthetisches Apigenintriglykosid dargestellt.
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  • 157
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Theoretical and Spectroscopic Investigations of Indigo Dyes, XI. Compounds with the Basic Chromophore of Thioindigo: Preparation and Properties of 3.4-Bis(alkylthio)hex-3-ene-2.5-dionesThe nucleophilic exchange of halogen in trans-3.4-dibromo- and -3.4-dichlorohex-3-ene-2.5-dione (4 and 5) with alkanethiols is studied. With bromine as leaving group substitution and reductive debromination leads to the formation of trans-3-methylthiohex-3-ene-2.5-dione (7a). With chlorine the expected trans-3.4-bis(alkylthio)hex-3-ene-2.5-diones (6a-c) are formed. These have the same structure and geometry as the basic chromophore of thioindigo, but they do not show the corresponding typical chemical and spectroscopic properties. They rather behave spectroscopically like β-alkylthio-α,β-unsaturated ketones. Conformation and spectroscopic properties of 6a-e are discussed with respect to the sterical requirements of the different groups at the sulfur atoms.
    Notes: Der Austausch der beiden Halogenatome von trans-3.4-Dibrom- und -3.4-Dichlor-hexen-(3)-dion-(2.5) (4 und 5) gegen Alkylmercaptane wird untersucht. Mit Brom als Abgangsgruppe erfolgt neben einfachem Austausch quantitativ eine reduktive Entbromierung zu trans-3-Methylmercapto-hexen-(3)-dion-(2.5) (7a), während mit Chlor als Abgangsgruppe zweifacher Austausch zu trans-3.4-Bis-alkylmercapto-hexen-(3)-dionen-(2.5) (6a-e) stattfindet. Diese zeigen nicht die spektroskopischen und chemischen Eigenschaften, die man für dieses - in der Verknüpfung ihrer funktionellen Gruppen dem Thioindigogrundchromophor entsprechende - System erwartet, sondern sie verhalten sich wie einfache β-alkylmercapto-α,β-ungesättigte Ketone. Die Abhängigkeit der Konformation und der spektroskopischen Eigenschaften von der Größe der Alkylreste am Schwefel wird diskutiert.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 549-557 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Boron, LIV. Chemical Properties of Tris(2.2-dimethylhydrazino)boraneIn contrast to the ready cleavage of BN-bonds in tris(dialkylamino)boranes by BCl3, (BH3)2, HCl or CH3J the prefered reactions of these acids with tris(2.2-dimethylhydrazino)borane (1) are additions. Due to the greater basicity of the dimethylamino group as compared to the NH moiety, additions occur at the group (CH3)2N before the group NH is attacked. Solvolysis of B[NH—N(CH3)2]3 (1) by H2O or C2H5OH yields (CH3)2 N—NH2 and B(OH)3 or B(OC2H5)3, respectively, but no mixed compounds XnB[NH—N(CH3)2]3 n are formed in these reactions or by ligand exchange with B(OCH3)3 or B[N(CH3)2]3. 1 is stable up to 280° at higher temperature condensation with formation of N.N-dimethylhydrazine occurs.
    Notes: Während die Verbindungen BCl3, (BH3)2, HCl und CH3J die B N-Bindungen von Tris(dialkylamino)-boranen spalten, lagern sie sich an Tris(2.2-dimethyl-hydrazino)-boran (1) an. Dabei erfolgt zunächst Addition an die stärker basische Dimethylaminogruppe, danach reagiert auch die schwächer basische NH-Gruppe. Solvolysen von 1 mit H2O und C2H5OH oder Komproportionierungen mit B(OCH3)3 oder B[N(CH3)2]3 führen nicht zu gemischten Verbindungen XnB[NH—N(CH3)2]3 n(X—OH, OR, N(CH3)2). Im Vergleich zu Tris(alkylamino)-boranen ist 1 thermisch sehr stabil. Erst oberhalb 280° spaltet sich N,N-Dimethylhydrazin ab.
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  • 159
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 605-638 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: o- and p-(Dicyanomethylene)quinocyclopropenes. Synthesis, Mechanisms of Formation and Propertieso- and p-quinocyclopropenes of the benzene, naphthalene, anthracene, phenanthrene, and fluorene series (9, 12-15, 29, 30b, 37, 38) are prepared a) by thermolysis of 1:1 adducts of 3-ethoxy-1.2-diaryl-cyclopropenylium cations 6 and arylmalodinitrile anions, b) by reaction of diarylcyclopropenones with arylmalodinitriles in acetic anhydride. The reaction mechanisms suggested by isolation of intermediates are discussed. - Polarography of the quinocyclopropenes shows reversible formation of a radical cation in a one-electron step. This is in agreement with calculations according to the simple HMO model, which give satisfactory correlations with polarography, u. v. and i. r. spectroscopical data.
    Notes: o- und p-Chinocyclopropene der Benzol-, Naphthalin-, Anthracen-, Phenanthren- und Fluorenreihe (9, 12-15, 29, 30b, 37, 38) werden dargestellt a) durch Thermolyse von 1:1-Addukten aus 3-Äthoxy-1.2-diaryl-cyclopropenylium-Kationen 6 und Arylmalodinitril-Anionen, b) durch Reaktion von Diarylcyclopropenonen und Arylmalodinitrilen in Acetanhydrid. Die sich aus der Isolierung von Zwischenprodukten ergebenden Reaktionsmechanismen werden diskutiert. - Durch polarographische Untersuchungen wird festgestellt, daß die Chinocyclopropene reversibel im Einelektronenschritt in ein Radikal-Kation übergehen. Dies wird durch Rechnungen nach dem einfachen HMO-Modell bestätigt, die befriedigende Korrelationen mit den polarographischen sowie UV- und IR-spektroskopischen Daten ergeben.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 665-667 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 668-670 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 71-74 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Bromination of Hydrocarbons in Liquid BromineThe bromination of aliphatic hydrocarbons in liquid bromine in the presence of catalytic amounts of hydrobromic acid is described. Hydrocarbons with neighbouring tertiary carbon atoms and tetraalkylated ethylenes give definite bromination products. From the corresponding hydrocarbons were obtained 1.4-Dibromo-2.3-bis(bromomethyl)but-2-ene (1), 1.4.5-Tribromo-2.3-bis(bromomethyl)pent-2-ene (2), 1.4.5-Tribromo-2.3-bis(bromomethyl)-hex-2-ene (3), 1.4.5-Tribromo-2-bromomethyl-3-(α.β-dibromoethyl)pent-2-ene (4), and 1.4.5.8-Tetrabromo-Δ4a(8a)-octalin (5).
    Notes: Bei der Bromierung in flüssigem Brom in Gegenwart katalytischer Mengen Bromwasserstoffsäure bilden aliphatische Kohlenwasserstoffe mit benachbarten tertiären Kohlenstoffatomen und tetraalkylierte Äthylene definierte Bromierungsprodukte. Im einzelnen werden 1.4-Dibrom-2.3-bis-brommethyl-buten-(2) (1), 1.4.5-Tribrom-2.3-bis-brommethyl-penten-(2) (2), 1.4.5-Tribrom-2.3-bis-brommethyl-hexen-(2) (3), 1.4.5-Tribrom-2-brommethyl-3-[α.β-dibromäthyl]-penten-(2) (4) und 1.4.5.8-Tetrabrom-Δ4a(8a)-octalin (5) aus den entsprechenden Kohlenwasserstoffen erhalten.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 110-130 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Complex Chemistry of Four-Centre π-Systems, III. Colour, Solvatochromy and Reduction Potentials of (1.4-Diazabutadiene)molybdenum TetracarbonylsMolybdenum tetracarbonyl complexes of the =N=C=C=N-system (1,4-diazabutadiene=DAB) show an intense, low energy electronic transition, which is antiparallel to the ground state dipole moment; its solvent dependance is measured for 33 mostly new compounds and shows directly the amount of metal-ligand interaction, and thus of π-backbonding. The π-delocalisation of metal-D-electrons strongly depends on the substituents of the DAB-system, but the complex ground state has still molybdenum in the valence state 0. The competing mesomeric, inductiv and steric effects of the DAB ligands can be separated, too, by polarographic reduction potentials of complexes and ligands. The results can be understood in terms of simple perturbation theory.
    Notes: Molybdäncarbonyl-Komplexe des =N=C=C=N-Systems (1.4-Diaza-butadien=DAB) zeigen eine antiparallel zum Grundzustandsdipolmoment gerichtete intensive farbgebende Elektronenanregung, deren an dreiunddreißig meist neuen Verbindungen untersuchte Solvatochromie direkte Aussagen über die Größe der Metall-Ligand-Termwechselwirkung und damit über die π-Rück bindung gestattet. Die Delokalisierung der Metall-D-Elektronen ist abhängig von den Substituenten des DAB-Systems, der Komplexgrundzustand enthält aber formal 0-wertiges Molybdän. Die konkurrierenden induktiven, mesomeren und sterischen Effekte der DAB-Liganden sind in den polarographischen Reduktionspotentialen der Komplexe und Liganden selbst ebenfalls genau abgrenzbar, bestätigen die Solvatochromie-untersuchungen und lassen sich im Rahmen einfacher Störungstheorie widerspruchsfrei deuten.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 138-144 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reductive Silylation of NaphthaleneThe reaction of naphthalene with trimethylchlorosilane and sodium has been found to afford 1.4-bis(trimethylsilyl)-1.4-dihydro- and 1.2-bis(trimethylsilyl)-1.2-dihydronaphthalene (1, 2), whereas potassium reacts to give mainly 1.2.3.7-tetrakis(trimethylsilyl)-1.2.3.4-tetrahydro-naphthalene (3) besides 1.2.4-tris(trimethylsilyl)-1.4-dihydro-(4) and 1.2.4-tris(trimethylsilyl)-1.2-dihydronaphthalene (5). The configuration has been determined by n.m.r. spectroscopy.
    Notes: Bei der reduktiven Silylierung von Naphthalin mit Natrium und Trimethylchlorsilan werden vorwiegend nur 1.4-Bis-trimethylsilyl-1.4-dihydro- und 1.2-Bis-trimethylsilyl-1.2-dihydronaphthalin (1, 2) gebildet. Ersetzt man jedoch das Natrium durch Kalium, so erhält man 1.2.4-Tris-trimethylsilyl-1.4-dihydro- (4) sowie 1.2.4-Tris-trimethylsilyl-1.2-dihydro-naphthalin (5) und vor allem 1.2.3.7-Tetrakis-trimethylsilyl-1.2.3.4-tetrahydro-naphthalin (3). - Die Aufklärung der Konfiguration erfolgte NMR-spektroskopisch.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 168-172 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Properties of 4-Chloro- and 4-Bromo-2H-chromenes and of 3-Bromo-2H-chromenesDehydrobromination of trans-3,4-dihalochromans yields the 4-halo-2H-chromenes 1-4. Dehydration of cis-3-bromo-4-hydroxychromans leads to the 3-bromo-2H-chromenes 5 and 6.
    Notes: Durch Abspaltung von Bromwasserstoff entstehen aus den trans-3.4-Dihalogen-chromanen die entsprechenden 4-Halogen-2H-chromene 1-4. Die 3-Brom-2H-chromene 5 und 6 erhält man durch Dehydratisierung der cis-3-Brom-4-hydroxy-chromane.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 210-219 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Vinylogous Acyl Compounds, IX. Hydrolysis of Vinylogous Carbonamidium SaltsThe hydrolysis of vinylogous carbonamidium salts 10 in aqueous sodium hydrogen carbonate solution does not lead - as hitherto supposed - to meso-(2-acylvinyl)acylacetaldehydes 8, but to bis(2-acylvinyl)ethers 11. The structure of these compounds results from n. m. r. and i. r. spectra and is confirmed by independent synthesis.
    Notes: Die Hydrolyse vinyloger Carbonamidiumsalze 10 in wäßriger Natriumhydrogencarbonat-Lösung führt nicht - wie bisher angenommen - zu meso-[2-Acyl-vinyl]-acylacetaldehyden 8, sondern zu Bis-[2-acyl-vinyl]-äthern 11. Die Strukturzuordnung dieser Verbindungen gründet sich auf NMR- und IR-spektroskopische Befunde sowie auf eine unabhängige synthese.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 160-167 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1.2.3-Tricarbonyl Compounds, V. Hydrate-forming 1.2.3-Tricarbonyl Compounds as Dienophiles in Diels-Alder ReactionsThe 1.2.3-tricarbonyl compounds 5-8 react as dienophiles and add isoprene or 2.3-dimethylbuta-1.3-diene to yield the spiro-dihydropyranes 9-16. I.r., mass, and n.m.r. spectra are discussed.
    Notes: Cyclische 1.2.3-Tricarbonylverbindungen (vgl. 5-8) reagieren als Dienophile mit Isopren und 2.3-Dimethyl-butadien-(1.3) unter Bildung der Spiro-dihydropyrane 9-16. Die IR- und Massenspektren der Reaktionsprodukte sowie die NMR-Spektren von 9 und 10 werden diskutiert.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 205-209 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Microbiological 11β-Hydroxylation of 3β-Hydroxy-5α.6α-epoxysteroidsSome 3β-Hydroxy-5α,6α-epoxysteroids are hydroxylated specifically in 11β-position without formation of by-products by the fungus Curvularia lunata.
    Notes: Eine Reihe von 3β-Hydroxy-5α.6α-epoxy-steroiden wird mit dem Pilz Curvularia lunata ohne Bildung von Nebenprodukten spezifisch in 11β-Stellung hydroxyliert.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 248-258 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Isoquinolines, II. 3.3-Dialkyl-3.4-dihydroisoquinolines from Alkyl-aryl-cyclopropanesUnder the conditions of the Graf-Ritter reaction alkyl-aryl-cyclopropanes 8 react with nitriles 2 via dialkyl-benzyl-carbonium ions 1 to give 3.3-dialkyl-3.4-dihydroisoquinolines 3. The effect of the substituents R1, R2, and R3 in 8 on the reaction is discussed.
    Notes: Alkyl-aryl-cyclopropane 8 reagieren unter den Bedingungen der Graf-Ritter-Reaktion über Dialkyl-benzyl-carboniumionen 1 mit Nitrilen 2 zu 3.3-dialkylsubstituierten 3.4-Dihydroisochinolinen 3. Der Einfluß der Substituenten R1, R2 und R3 in 8 auf den Reaktionsverlauf wird besprochen.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 270-278 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses of Aromatic Erythrina-Alkaloids, XVIII. Concerning the Existence of trans-ErythrinanesWolff-Kishner reduction of the 6α-bromo-ketolactam 2 affords, among other products, the 6β-hydroxyerythrinane-8-one 8. This is the first compound of the trans-erythrinane series.
    Notes: Bei der Wolff-Kishner-Reduktion des 6α-Brom-ketolactams 2 entsteht neben anderen Produkten auch das 6β-Hydroxy-erythrinanon-(8) 8, der erste Vertreter der trans-Erythrinan-Reihe.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 320-332 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ionization of Organomagnesium Compounds, IV. Formation of Carbanions from Organomagnesium Compounds by Means of Hexamethyl-phosphortriamideStepwise addition of hexamethylphosphortriamide (HMPT) to the solutions of benzyl-like organomagnesium compounds in diethylether results in drastic changes which can be observed spectroscopically. First, the absorption maxima are shifted to longer wave lengths in an apparently continuous manner, until two equivalents of the strongly donating cosolvent have been added. Further addition of HMPT leads to ionization of the C—Mg-bonds. This can be seen from the development of new bands characteristic of the carbanions, as represented by the alkali metal derivatives.
    Notes: Der Zusatz von Hexamethylphosphorsäuretriamid (HMPT) zu den ätherischen Lösungen von benzylartigen Organomagnesium-Verbindungen führt zu drastischen, spektral beobachtbaren Veränderungen. Zunächst tritt eine scheinbar kontinuierliche Verschiebung der Absorptionsmaxima nach längeren Wellen ein, bis zwei Äquivalente des starken Donor-Solvens zugesetzt sind. Weitere Zugabe von HMPT führt zur Ionisation der C—Mg-Bindungen und Freisetzung der betreffenden Carbanionen, die sich durch das Aufkommen der (von den Alkalimetall-Verbindungen bekannten) Carbanion-Banden zu erkennen gibt.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 343-343 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
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  • 173
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 350-351 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 174
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 391-401 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Photochemistry of Small Rings, 23. Carbenacyclopentadienes and Alkynes. - Photochemical Synthesis of Benzindenes and SpirocyclopropenesPhotolysis of phenyl-substituted diazocyclopentadienes 3 in alkynes leads via the intermediate carbenacyclopentadienes to the formation of 1H-benz[e]indenes 5. 5c was degraded to the known compound 3-phenyl-2.3-dihydro-1H-benz[e]indene (8). - On irradiation 3a, f in dimethyl acetylenedicarboxylate yield the spiro[2.4]heptatrienes 9 instead of 5. 9a was rearranged by further irradiation to the benz[e]indene 5f. - The mechanism of the benzindene formation is discussed.
    Notes: Die Photolyse phenyl-substituierter Diazo-cyclopentadiene 3 in Alkinen führt über die Carbena-cyclopentadiene zu 1H-Benz[e]indenen 5. 5c wurde zum bekannten 3-Phenyl-2.3-dihydro-1H-benz[e]inden (8) abgebaut. - Die Bestrahlung von 3a, f in Acetylendicarbonester ergab jedoch nicht 5, sondern die Spiro[2.4]heptatriene 9. 9a wird durch weitere Belichtung in das Benz[e]inden 5f umgelagert. - Der Mechanismus der Benzinden-Bildung wird diskutiert.
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  • 175
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 421-428 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Michael Additions with Ethyl β-Arylacrylates: The Synthesis of 3-Aryl-2.2-bis(ethoxycarbonyl)-5-pyrrolidonesThe Michael reaction of ethyl β-arylacrylates with diethyl acetaminomalonate followed by cyclisation directly yielded the 3-aryl-2.2-bis(ethoxycarbonyl)-5-pyrrolidones (4).
    Notes: β-Aryl-acrylsäure-äthylester werden mit Acetamino-malonsäure-diäthylester nach Michael unter nachfolgender Cyclisierung direkt zu 3-Aryl-2.2-bis-äthoxycarbonyl-pyrrolidonen-(5) (4) umgesetzt.
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  • 176
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 461-472 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Chalcogen Compounds Diphenyldithiophosphinato Complexes of Vanadium(III), Vanadium(IV) and Molybdenum(VI)The preparation and properties of the compounds [(C6H5)2PS2]2MoO2 (3), [(C6H5)2PS2]2-VO (4) and [(C6H5)2PS2]3 V (5) are described. Their vibrational and electronic spectra are reported. The parameters 10 Dq = 13 200/cm and B = 395/cm were calculated from the electronic spectrum of the vanadium(III) compound.
    Notes: Die Darstellung und Eigenschaften der Verbindungen [(C6H5)2PS2]2MoO2 (3), [(C6H5)2PS2]2-VO (4) und [(C6H5)2PS2]3 V (5) werden beschrieben. Die Schwingungs- und Elektronenspektren werden mitgeteilt und letztere mit der Kristallfeldtheorie interpretiert. Für die Vanadin(III)-Verbindung lassen sich aus den Übergängen ν1(3T1g→3T2g) und ν2(3T1g(F) → 3T1g(P)) die Werte für 10 Dq 13200/cm und B 395/cm berechnen.
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  • 177
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 513-518 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Reaction of Boron-Nitrogen Compounds with Excited Carbon Atoms Generated in an ArcThe interaction of carbon vapor from a carbon are with dimethylaminoborane, (CH3)2N—BH2 (1), yields as the main reaction product (dimethylamino)methylborane, (CH3)2 N—BH—CH3 (3), which combines with the starting material to form the four-membered ring compound 5. Other compounds formed in this reaction are (dimethylamino)dimethylborane, (CH3)2N—B(CH3)2 (2), and dimethylaminborane, (CH3)2NH—BH3, as well as the previously unknown compound (CH3)2N—BH—O—BH—N(CH3)2 (6), which could be isolated.
    Notes: Die Reaktion von im Lichtbogen erzeugten Kohlenstoffatomen mit Dimethylaminoboran, (CH3)2N—BH2 (1), ergibt als Hauptreaktionsprodukt das Dimethylamino-methylboran, (CH3)2N—BH—CH3 (3), das sich mit dem Ausgangsmaterial zur Vierringverbindung 5 umsetzt. Weiterhin findet man Dimethylamino-dimethylboran, (CH3)2N—B(CH3)2 (2) und Dimethylamin-boran, (CH3)2NH—BH3. Schließlich kann die bisher noch nicht bekannte Verbindung (CH3)2N—BH—O—BH—N(CH3)2 (6) isoliert werden.
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  • 178
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 528-532 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Simple Pathway to Azide-Bridged Palladium and Platinum(II) ComplexesSalts of azide-bridged dimeric cations are prepared in quantitative yields by reaction of the monomeric diazido complexes (Ph3P)2 M(N3)2 with nitrosyl- or triethyloxonium salts, and diethyl sulfate, respectively.
    Notes: Salze der azidverbrückten dimeren Kationen entstehen in praktisch quantitativer Ausbeute durch Umsetzung der monomeren Diazidokomplexe (Ph3P)2 M(N3)2 mit Nitrosyl- oder Triäthyloxonium-Salzen bzw. mit Diäthylsulfat.
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  • 179
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 558-576 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Boron, LV. Intramolecular Hydrogen Bonding in (2.2-Dimethylhydrazino)boranesN. m. r. spectroscopic investigations on (2.2-dimethylhydrazino)boranes demonstrate the presence of intramolecular hydrogen bonds in these compounds, and this is further proved by comparison with isopropylaminoboranes. The planar configuration of B[NH—N(CH3)2]3 and B2[NH—N(CH3)2]4 is determined by this bonding. The N—H … N bond energy has been estimated as ∼2.5 kcal/mole from the temperature dependence of the n. m. r. spectra. Intermolecular association is indicated in the compounds R2B—NH—N(CH3)2. - The basicity towards the acid CDCl3 decreases in the isopropylaminoborane series for (2.2-dimethylhydrazino)boranes the series has been found confirming the effects of intramolecular hydrogen bonding.
    Notes: Kernresonanzspektroskopische Untersuchungen an (2.2-Dimethyl-hydrazino)-boranen belegen durch Vergleich mit Isopropylamino-boranen intramolekulare Wasserstoffbrückenbindungen. Diese sind insbesondere für B[NH—N(CH3)2]3 und B2[NH—N(CH3)2]4 konfigurationsbestimmend. Ihre Bindungsenergie beträgt ∼2.5 kcal/Mol. In R2B—NH—N(CH3)2 erfolgt Assoziation über intermolekulare N—H … N-Bindungen, die in Lösung leicht aufbrechen. - Basizitätsbestimmungen mit der Referenzsäure CDCl3 ergeben die Reihe für die Isopropylamino-borane, jedoch für die (2.2-Dimethyl-hydrazino)-borane in Übereinstimmung mit den durch intramolekulare Wasserstoffbrückenbindungen bewirkten Effekten.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 4-10 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Structure of Thioamides and their Derivatives, XI. N.M.R-Spectroscopic Studies and the Mechanism of Isomerization of Thioamide anionsIn the n. m. r. spectra of thioformamide anions 2 a larger trans long-range coupling constant is observed than in the spectra of the corresponding thioformamides 1. In spite of this spectral evidence indicating that 2 has the stronger partial double bond character, 2 isomerizes faster than 1. This suggests that isomerization proceeds via an inversion mechanism, an assumption which is verified by the steric effects of o-substituents in thioformanilide anions 4. On the other hand, in the case of thioformanilides 3 a rotation mechanism is observed.
    Notes: In den NMR-Spektren von Thioformamid-Anionen 2 wird eine größere trans-Fernkopplungskonstante als in den entsprechenden Thioformamiden 1 gefunden. Trotz des daraus zu folgernden größeren Doppelbindungscharakters wird bei 2 eine schnellere Isomerisierung als bei 1 beobachtet. Der dadurch nahegelegte Inversionsmechanismus wird durch den sterischen Einfluß von o-Substituenten in den Thioformanilid-Anionen 4 belegt, während für die Thioformanilide 3 ein Rotationsmechanismus gefunden wird.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 50-58 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cycloadditions with Carbodiimides, 1. Influences of Substituents in the Cycloaddition of Ketenes to CarbodiimidesCarbodiimides and ketenes yield 4-imino-2-azetidinones (1-14) in a cycloaddition reaction. Aliphatic carbodiimides show higher reactivity than aromatic carbodiimides. In mixed aliphatic-aromatic substituted carbodiimides, therefore, preferentially one of the C=N bonds undergoes reaction. The structures of the resulting compounds were confirmed by chemical transformations, i.r., and n.m.r. spectra.
    Notes: Carbodiimide gehen mit Ketenen Cycloadditionen zu 4-Imino-azetidinonen-(2) (1-14) ein. Aliphatisch substituierte Carbodiimide sind reaktiver als aromatisch substituierte. Bei aliphatisch-aromatisch substituierten Carbodiimiden gelingt es daher, bevorzugt eine der beiden C=N-Doppelbindungen zur Reaktion zu bringen. Die Konstitutionen der 4-Iminoazetidinone-(2) ergeben sich aus IR- und NMR-Spektren in Verbindung mit chemischen Umwandlungen.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 75-77 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Higher Ring Systems with the Structural Characteristics of the Diamond-type Lattice, 1. Enamine Formation and Ring Fusion in the Case of Bicyclo[3,3,1]nonane-3,7-dioneBicyclo[3.3.1]nonane-3.7-dione can be condensed with pyrrolidine to form 1.3-dipyrrolidino-2-oxaadamantane. From this system the mono- and bis-pyrrolidinoenamine of bicyclo[3.3.1]-nonane-3.7-dione (3,5) can be obtained. The reaction of the bis-enamine 3 with ethyl bromomethylacrylate leads to the pentacycle 4.
    Notes: Bicyclo[3.3.1]nonandion-(3.7) (1) kann mit Pyrrolidin zum 1.3-Dipyrrolidino-2-oxa-adamantan (2) kondensiert werden. Aus diesem System sind das Mono- und Bis-pyrrolidin-Enamin des Bicyclo[3.3.1]nonandions-(3.7) (3.5) erhältlich. Über das Bis-Enamin 3 kann mit α-Brom-methyl-acrylsäure-äthylester der Pentacyclus 4 auf gebaut werden.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 92-109 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Copper(I)-diazabutadiene Halides1,4-Diazabuta-1,3-dienes react with cuprous halides to form strongly coloured, monomeric 1:1 adducts 2-11, 16-20, 24, 25, containing copper with threefold coordination. This coordination number determines the spectroscopic behaviour. While diazabutadiene complexes of other metals in low oxidation states show a long-wavelength absorption with strong metal-to-ligand CT character, in the copper complexes 2-11, 16-20, 24, 25 the metal terms are about equally important in the ground and excited state without showing the typical solvatochromism and the extremely high intensity of the chromogenic transition.
    Notes: 1.4-Diaza-butadiene-(1.3) bilden mit Kupfer(I)-halogeniden stark farbige, monomere 1:1-Komplexe 2-11, 16-20, 24, 25 mit dreifach koordiniertem Kupfer. Diese Koordination bestimmt das elektronenspektroskopische Verhalten. Während in Diazabutadien-Komplexen anderer Metalle in niedrigen Oxydationsstufen die längstwellige Absorption sehr starken Metall-Ligand-charge-transfer-Charakter hat, fehlt hier bei etwa gleich starker Beteiligung von Metalltermen im Grundzustand und angeregten Zustand die typische Solvatochromie und die extrem hohe Intensität des farbgebenden Übergangs.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 145-149 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and N.M.R. Spectra of Trimethyl(allylidene)- and -(benzylidene)phosphoraneThe title compounds (1 and 2) have been prepared in a pure state for the first time. Their 1H n. m. r. spectra could be completely analysed and the data obtained are taken as evidence for a delocalisation of the ylidic carbanionic charge into the π-system.
    Notes: Trimethyl-allyliden- und -benzyliden-phosphoran (1 und 2) wurden erstmals rein dargestellt. Die 1H-NMR-Spektren ließen sich vollständig analysieren und im Sinne einer Delokalisierung der negativen Ladung in das π-System deuten.
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    Description / Table of Contents: Reaction of Organophosphorus CH-acidic Compounds with Schiff Bases in the Presence of Acid and Alkaline Catalysts, V. Reaction of Esters of Propylbenzylphosphinic Acid in the Presence of Sodium AmideThe reaction of esters 1 of propylbenzylphosphinic acid with Schiff bases 2 in the presence of sodium amide has been studied. In ether at -33° esters of (2-arylamino-1,2-diarylethyl)-propylphosphinic acids (3 and 4) are obtained in 20-81% yields. In ether at 10° and in liquid ammonia small amounts of trans-olefins (5) are formed along with the adducts 3 and 4 (the yields of which decrease). The reactivity of 1 is compared with that of the esters of benzyl-phosphonic acid, and the mechanism of the reaction of 1 with 2 is discussed.
    Notes: Bei der Umsetzung der Propyl-benzyl-phosphinsäureester 1 mit Schiffschen Basen 2 in Gegenwart von Natriumamid entstehen in Äther bei -33° Ester der [2-Arylamino-1.2-diaryläthyl]-propyl-phosphinsäuren (3 und 4) in 20-81 proz. Ausbeute. In Äther bei 10°, in geringem Umfang auch in flüssigem Ammoniak, bilden sich neben den verringert auftretenden Addukten 3 und 4 auch noch trans-Olefine (5). Die Reaktionsfähigkeit von 1 im Vergleich zu den Benzylphosphonsäureestern sowie der Mechanismus ihrer Umsetzung mit 2 werden diskutiert.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 220-227 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: cis- and trans-3.3′-Dimethoxy-5.5′-di-tert-butyldiphenoquinone-(4.4′)The two geometric isomers of 3.3′-dimethoxy-5.5′-di-tert-butyldiphenoquinone-(4.4′) (1) were isolated. The configurational assignment was made on the basis of n.m.r. spectra and the X-ray diffraction pattern from single crystals. The free enthalpy of activation for the cis/trans-isomerisation was determined. -p-Diphenoquinones with different substituents in both rings, which were needed as model compounds, could be prepared for the first time.
    Notes: Die beiden geometrischen Isomeren des 3.3′-Dimethoxy-5.5′-di-tert.-butyl-diphenochinons-(4.4′) (1) wurden isoliert. Die Konfigurationszuordnung gelang anhand der NMR-Spektren sowie von Einkristall-Röntgenaufnahmen. Die Freie Aktivierungsenthalpie der cis/trans-Isomerisierung wurde bestimmt. -p-Diphenochinone mit verschiedenen Substituenten in beiden Ringen, als Vergleichssubstanzen benötigt, konnten erstmals dargestellt werden.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 290-300 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reductive Rearrangements of the Retrobenzilic Acid Type Induced by Lewis Acids, VI. Crossing ExperimentsBy a series of crossing experiments the reductive retrobenzilic acid rearrangements of 5,5-diaryldithiohydantoins (1) and 4,4-diaryl-2-imidazoline-5-thiones (3), induced by aluminium chloride and yielding the corresponding 4,5-diaryl-4-imidazoline-2-thiones (2) and 4,5-diarylimidazoles (4), respectively, were shown to proceed intramolecularly.
    Notes: Durch eine Serie von Kreuzungsversuchen wird der intramolekulare Verlauf der durch Aluminiumchlorid ausgelösten reduktiven Retrobenzilsäure-Umlagerung von 5.5-Diaryl-dithiohydantoinen (1) und 4.4-Diaryl-Δ2-imidazolin-thionen-(5) (3) zu 4.5-Diaryl-Δ4-imidazolin-thionen-(2) (2) bzw. 4.5-Diaryl-imidazolen (4) erwiesen.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 348-349 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 353-359 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Are Absolute Asymmetric Photosyntheses Possible?The addition of carbenes, generated from diazoalkanes by circularly polarized light, to trimethylethylene (1) yielded optically inactive cyclopropanes. Attempts to obtain a chiral photochemical cyclodimerisation of cyclopent-1-en-3-one (4) or to reproduce two absolute asymmetric photosyntheses described earlier also failed. Thus such syntheses appear to be questionable.
    Notes: Mit zirkular polarisiertem Licht aus Diazoalkanen erzeugte Carbene lieferten bei der Reaktion mit Trimethyläthylen (1) optisch inaktive Cyclopropane. Ebenso negativ verliefen Versuche, eine chirale photochemische Cyclodimerisierung von Cyclopenten-(1)-on-(3) (4) zu erzielen oder zwei früher beschriebene absolute asymmetrische Photosynthesen zu reproduzieren. Die Möglichkeit derartiger Synthesen scheint damit in Frage gestellt.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 360-364 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1:1-Complexes of Mercuric Halides with MethyldiphenylstibineThe complexes [HgX2·SbCH3(C6H5)2]2 mit X=Cl (5), Br (6), J (7) precipitated on combination of equimolar amounts of the components in methanol or acetone solution. Dimeric, halogen-bridged structures for these complexes have been derived from infrared spectra (300-33/cm). The ligand methyldiphenylstibine (4) has been obtained in 89% yield by reaction of dijodomethylstibine (3) with phenylmagnesium bromide.
    Notes: Die Komplexe [HgX2·SbCH3(C6H5)2]2 mit X=Cl (5), Br (6), J (7) fallen bei der Vereinigung äquimolarer Mengen der Komponenten in Methanol- oder Aceton-Lösung aus. Dimere, halogenverbrückte Strukturen dieser Komplexe werden aus Infrarotspektren (300-33/cm) abgeleitet. Der Ligand Methyldiphenylstibin (4) wird durch Reaktion von Dijodmethylstibin (3) mit Phenylmagnesiumbromid in 89 proz. Ausbeute erhalten.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 407-411 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of α-Halocarbonyl Compounds with the Guanidine System. II. Reaction of ω-Bromoacetophenone with Anilinoguanidineω-Bromoacetophenone reacts with anilinoguanidine to give 2-amino-1-anilino-4-phenylimidazole (1a). On treatment with boiling hydrochloric acid 1a undergoes benzidine-like rearrangement yielding 2-amino-4(5)-phenyl-5(4)-[p-aminophenyl]-imidazole (6).
    Notes: ω-Brom-acetophenon reagiert mit Anilino-guanidin zu 2-Amino-1-anilino-4-phenyl-imidazol (1a), das durch siedende Salzsäure benzidinartig in 2-Amino-4(5)-phenyl-5(4)-[p-amino-phenyl]-imidazol (6) umgelagert wird.
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 429-439 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Stereoselective Synthesis of cis-3-Aryl-2-ethoxycarbonyl-5-pyrrolidonescis-3-Aryl-2-ethoxycarbonyl-5-pyrrolidones (6) are obtainable from 3-aryl-2,2-bis(ethoxy-carbonyl)-5-pyrrol idones(1) via their dicarboxy-derivatives (3) or their half-esters (5) by moderate stereoselective decarboxylation.
    Notes: Aus 3-Aryl-2.2-bis-äthoxycarbonyl-pyrrolidonen-(5) (1) lassen sich über die Dicarboxy-Verbindungen (3) oder über die Halbester (5) durch mäßig stereoselektive Decarboxylierung cis-3-Aryl-2-äthoxycarbonyl-pyrrolidone-(5) (6) gewinnen.
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  • 193
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 456-460 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Chemical Synthesis of 2.4-Dithiopyrimidine Nucleoside-5′-mono- and -polyphosphatesThe synthesis of 2-thiothymidine-5′-phosphate (3), 2.4-dithiothymidine-5′-triphosphate (8c), 2.4-dithiouridine-5′-diphosphate (7a), 2.4-dithioribothymidine-5′-diphosphate (7b), and 2.4-dithiouridine-5′-triphosphate (8a) is reported. The behaviour in paper chromatography and paper electrophoresis as well as the phosphate content have been used as criteria of the purity.
    Notes: 2-Thio-thymidin-5′-phosphat (3), 2.4-Dithio-thymidin-5′-triphosphat (8c), 2.4-Dithio-uridin-5′-diphosphat (7a), 2.4-Dithio-ribothymidin-5′-diphosphat (7b) und 2.4-Dithio-uridin-5′-triphosphat (8a) wurden synthetisiert. Als Reinheitskriterien dienen das Verhalten in Papierchromatographie sowie Papierelektrophorese und der Phosphatgehalt.
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  • 194
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 519-523 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: E.S.R. Investigation of the Dinaphtho[2.3-c:2′.3′-h]phenothiazinyl Radical8H-Dinaphtho[2.3-c : 2′.3′-h]phenothiazine (1), obtained by reaction of di-2-anthrylamine with sulfur, yields the stable free radical 4 by dehydrogenation. For the solid state a free radical content of 85% has been determined by e. s. r. Solutions of 4 gave a complex e. s. r. spectrum which is discussed in connection with Hückel calculations.
    Notes: Das aus 2.2′-Dianthrylamin durch Umsetzung mit Schwefel zugängliche 8H-Dinaphtho-[2.3-c: 2′.3′-h]phenothiazin (1) liefert bei der Dehydrierung das stabile freie Radikal 4. Der Radikalgehalt beträgt im Kristall nach ESR-Messungen 85%. Lösungen von 4 liefern ein linienreiches ESR-Spektrum, das im Zusammenhang mit Hückel-Rechnungen diskutiert wird.
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  • 195
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    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 544-548 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: SO3-Insertion into Organopentacarbonylrhenium(I) CompoundsThe hitherto unknown sulfonato complexes CH3SO3ReI(CO)5 (4), C6H5SO3ReI(CO)5 (5), and p-CH3—C6H4SO3ReI (CO)5 (6) are obtained according to equation (1) by insertion of SO3 into the metal-carbon bond of CH3Re(CO)5 (1), C6H5Re(CO)5 (2), and p-CH3—C6H4Re(CO)5 (3). The composition and the structure of these compounds result from 1H n. m. r., mass, and i. r. spectroscopic investigations.
    Notes: Durch Einschiebung von SO3 in die Metall-Kohlenstoff-Bindung von CH3Re(CO)5 (1), C6H5Re(CO)5 (2) und p-CH3—C6H4Re(CO)5 (3) gelingt gemäß Gl. (1) die Darstellung der noch unbekannten Sulfonato-Komplexe CH3SO3ReI(CO)5 (4), C6H5SO3ReI(CO)5 (5) und p-CH3—C6H4SO3ReI(CO)5 (6). Die Zusammensetzung und Struktur dieser Verbindungen wurde mit Hilfe von 1H-NMR-, massen- und IR-spektroskopischen Untersuchungen ermittelt.
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  • 196
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    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 577-592 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organic Peroxides, IX. Preparation and Thermolysis of tert-Butyl α-Aryloxy- and α-ArylthioperacetatesEleven tert-butyl α-aryloxyperacetates and four tert-butyl α-arylthioperacetates were prepared and characterized by spectra and analyses. The products and rates of their thermolyses are explained by a homolytic fragmentation mechanism. The rates are predominantly influenced by a polar effect. This is supported by the observation of Hammett relations in both series (σ = -1.1 and -1.3).
    Notes: 11 α-Aryloxy-peressigsäure-tert.-butylester und 4 α-Arylmercapto-peressigsäure-tert.-butylester wurden synthetisiert und durch Spektren und Elementaranalysen charakterisiert. Die Thermolyse dieser Peroxide erfolgt durch homolytische Fragmentierung. Ihre Geschwindigkeit gehorcht in beiden Reihen der Hammett-Beziehung mit σ = -1.1 bzw. -1.3 und unterliegt somit einem polaren Effekt.
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  • 197
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 653-660 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Preparation of Fluorocyclotriphosphazenes with Phosphazene Side ChainsFluorocyclotriphosphazenes with phosphazene side chains were prolonged by the alternating reactions of hexamethyldisilazane and phosphorus pentachloride (1-8). The compounds formed contain up to six alternating (PN) bonds. Reactions of heptamethyldisilazane and methylamine give 9 and 10. Substitution reactions with the higher ring compounds yield 11-14. The properties of these substances are described and their structures could be likely prooved on the basis of 31P and 19F n. m. r. investigations. The compounds are further characterized by analysis and i. r. spectra.
    Notes: Fluorcyclotriphosphazene mit Phosphazenseitenkette werden durch alternierende Reaktionen mit Hexamethyldisilazan und Phosphorpentachlorid verlängert (1-8). Dabei entstehen Verbindungen, die bis zu sechs alternierende (PN)-Bindungen enthalten (7, 8). Umsetzungen mit Heptamethyldisilazan und Methylamin ergeben 9 und 10. Substitutionen an höheren Ringverbindungen führen zu 11-14. Die Eigenschaften dieser Substanzen werden beschrieben und ihre Struktur durch 31P- und 19F-NMR-Untersuchungen wahrscheinlich gemacht. Die Verbindungen werden weiterhin durch Analysen und IR-Spektren charakterisiert.
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  • 198
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    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 661-664 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 199
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 677-678 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 683-685 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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