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  • 1
    Electronic Resource
    Electronic Resource
    Die Konstitutionsermittlung „gemischter Dimerer“ des 2.4.6-Triphenyl-phenoxyls durch 18O-Markierung (1968)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 101 (1968), S. 2519-2521 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Konstitution der Gemischten Dimeren 3 und 4 in Lösung wird mit Hilfe von 2.4.6-Triphenyl-[18O]phenoxyl zugunsten von 3b und 4b entschieden, da in den IR-Spektren nur eine Verschiebung der Ätherbande, nicht jedoch der Carbonylbande auftritt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19681010731
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  • 2
    Electronic Resource
    Electronic Resource
    Dikation-ether und verwandte Verbindungen, 1. Über Dikation-chalkogenide und -dichalkogenide (1983)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 3659-3674 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dication Ethers and Related Compounds, 1. On Dication Chalkogenides and DichalkogenidesReaction of N,N-, N,S-, S,S-, and O,O-substituted thiones 4a-f or selones 6a-c with trifluoromethanesulfonic anhydride leads to dication disulfides 5a-f or diselenides 7a-c, resp. No dication sulfides or selenides are obtained whose formation would parallel the reactivity of the corresponding urea derivatives. This class of dications (14, 15) is, on the other hand, accessible by the reaction of dication ethers 13 with thiones 4 or selones 6. 1H and 13C NMR data of the dication dichalkogenides and chalkogenides are compared with each other.
    Notes: N,N-, N,S-, S,S- und O,O-substituierte Thione 4a-f und Selone 6a-c reagieren mit Trifluormethansulfonsäureanhydrid zu Dikation-disulfiden 5a-f bzw. -diseleniden 7a-c. Die Bildung von Dikation-sulfiden (Dikation-seleniden), welche eine Parallele zum Reaktionsverhalten der analogen Harnstoffderivate darstellen würde, wird nicht beobachtet. Diese Verbindungsklasse (14, 15) ist jedoch durch Reaktion von Dikation-ethern 13 mit Thionen 4 bzw. Selonen 6 zugänglich. 1H- und 13C-NMR-Daten der Dikation-dichalkogenide und -chalkogenide werden miteinander verglichen.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19831161114
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  • 3
    Electronic Resource
    Electronic Resource
    Actinomycine, XXVII; Synthesen von Actinomycinen und actinomycin-ähnlichen Chromopeptiden, II. Actinocinyl-bis-peptide (1966)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 99 (1966), S. 3672-3687 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Fünf Actinocinyl-bis-peptide (8, 9, 11, 12, 24) wurden synthetisiert, deren vier bzw. sechs Aminosäuren die gleiche Struktur, Konfiguration und Sequenz haben wie in den C-Actinomycinen. Drei der neuen Verbindungen sind identisch mit Abbauprodukten aus Actinomycin C1, C2 und C3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19660991135
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  • 4
    Electronic Resource
    Electronic Resource
    Sila-Pharmaka, XIX. Sila-Pridinol und Pridinol: Darstellung und Eigenschaften sowie Strukturen im kristallinen und gelösten Zustand (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 1962-1980 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Sila-Pharmaca, XIX. Sila-Pridinol and Pridinol: Preparation and Properties as well as Structures in the Solid State and in SolutionSila-pridinol (2b), a sila-analogue of the anticholinergic pridinol (2a), was prepared by two different routes. The crystal and molecular structures of 2a and 2b were determined by X-ray structural analyses. 2a forms intramolecular hydrogen bonds in the solid state, whereas centrosymmetric cyclic dimers linked through intermolecular hydrogen bonds are observed for crystalline 2b. IR- and 1H NMR spectroscopic as well as cryoscopic studies yielded information about the structures of 2a and 2b in different solvents.  -  The pharmacological and toxicological properties of 2a and 2b were compared with one another on the basis of known structure-activity relationships. The anticholinergic properties of 2b were found to be about five times as strong as those of 2a.
    Notes: Sila-Pridinol (2b), ein Sila-Analogon des Anticholinergicums Pridinol (2a), wurde auf zwei verschiedenen Wegen dargestellt. Die Kristall- und Molekülstrukturen von 2a und 2b wurden rönt-genstrukturanalytisch bestimmt. 2a bildet im festen Zustand intramolekulare Wasserstoffbrückenbindungen aus, während sich in kristallinem 2b zentrosymmetrische, durch intermolekulare H-Brückenbindungen verknüpfte cyclische Dimere finden. IR- und 1H-NMR-spektroskopische sowie kryoskopische Untersuchungen ergaben Informationen über die Strukturen von 2a und 2b in verschiedenen Lösungsmitteln.  -  Die pharmakologischen und toxikologischen Eigenschaften von 2a und 2b wurden unter dem Gesichtspunkt bekannter Struktur-Wirkungs-Beziehungen vergleichend untersucht. 2b erwies sich als ein etwa fünfmal so starkes Anticholinergicum wie 2a.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130531
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  • 5
    Electronic Resource
    Electronic Resource
    Synthese sowie Kristall- und Molekularstruktur von 1,1,3,3-Bis-(1′,1′,5′,5′-tetramethylpentamethylen)allen (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 967-972 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Crystal and Molecular Structure of 1,1,3,3-Bis(1′,1′,5′,5′-tetramethylpentamethylene)alleneThe symmetrically substituted allene derivative 1,1,3,3-bis(1′,1′,5′,5′-tetramethylpentamethylene)allene (4) crystallizes in the monoclinic space group P21/c with Z = 4 molecules in the unit cell. The deviation of 2.4° from the linear arrangement of the allene group is produced by different interactions with the equatorial methyl substituents.
    Notes: Das symmetrisch substituierte Allenderivat 1,1,3,3-Bis(1′,1′,5′,5′-tetramethylpentamethylen)allen (4) kristallisiert in der monoklinen Raumgruppe P21/c mit Z = 4 Molekülen in der Elementarzelle. Die Abweichung von 2.4° aus der linearen Anordnung der Allengruppierung ist durch ihre unterschiedlichen Wechselwirkungen mit den äquatorialen Methylsubstituenten bedingt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821150313
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  • 6
    Electronic Resource
    Electronic Resource
    The formation of crosslinks in cellulose during nitration (1958)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 30 (1958), S. 1-4 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Nitrates of cellulose oxidized with periodate are incompletely soluble. By means of sedimentation and diffusion experiments it has been established that this phenomenon is due to crosslinks formed during nitration. On the basis of these results investigation was made whether crosslinks are formed during a nitration if, before nitration, cellulose is impregnated with some small-molecular compound containing two functional groups. The compounds used were oxalic, glyoxylic, and sebacic acids. The results obtained by the use of the two first mentioned acids were not quite clear. The nitrates of linters impregnated with sebacic acid, and nitrated by the use of a nitration acid prepared from 100% nitric acid, were only partly soluble in acetone. If the linters were hydrolyzed before the impregnation, the nitrates then prepared were completely soluble. In this case also, the increase in viscosity reveals the formation of crosslinks. Cellulose oxidized with periodate was extracted by means of NaOH solution. A qualitative test showed that oxalic, glycolic, and lactic acids were present in the solution.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1958.1203012101
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  • 7
    Electronic Resource
    Electronic Resource
    Über polyoxyundecansäuren1323. Mitteilung über makromolekulare Verbindungen2 (1947)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 1 (1947), S. 36-43 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Höhermolekulare Polyoxyundecansäuren vom osmotischen Molekulargewicht über 10000 haben verzweigte Makromoleküle, da das Endgruppenmolekulargewicht, bestimmt aus dem Carboxylgehalt, niedriger ist als das osmotische Molekulargewicht und das andere Endgruppenmolekulargewicht.Das viskosimetrische Molekulargewicht dieser verzweigten Polyester ist ebenfalls geringer als das osmotische Molekulargewicht.Werden die Polyester bei Temperaturen über 200° hergestellt, so treten sekundäre Veränderungen unter Abspaltung von Endgruppen ein.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1947.020010103
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  • 8
    Electronic Resource
    Electronic Resource
    Radical Ions in the Pentalene Series. Part IIIPart II: [1]. Three paramagnetic redox stages of a dicyclopenta[a,e]pentalene (1988)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 71 (1988), S. 1011-1016 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Five redox stages have been observed for the recently synthesized 1,3,5,7-tetra(tert-butyl) derivative 1 of the dicyclopenta[a,e]pentalene, a novel non-alternant hydrocarbon: the radical cation \documentclass{article}\pagestyle{empty}\begin{document}$1^{+ \atop \dot{}}$\end{document}, the neutral compound 1, the radical anion \documentclass{article}\pagestyle{empty}\begin{document}$ 1^{\scriptstyle {{\relbar}\kern-4pt {.} }} $\end{document}, the dianion 12-, and the radical trianion \documentclass{article}\pagestyle{empty}\begin{document}$ 1^{3\scriptstyle {{\relbar}\kern-4pt {.} }} $\end{document}. Information about the the electronic structure of the three paramagnetic stages, \documentclass{article}\pagestyle{empty}\begin{document}$1^{+ \atop \dot{}}$\end{document}, \documentclass{article}\pagestyle{empty}\begin{document}$ 1^{\scriptstyle {{\relbar}\kern-4pt {.} }} $\end{document}, and \documentclass{article}\pagestyle{empty}\begin{document}$ 1^{3\scriptstyle {{\relbar}\kern-4pt {.} }} $\end{document} is provided by the use of ESR, ENDOR, and TRIPLE resonance spectroscopy. The unpaired electron in the trianion resides mainly on the ‘inner’ butadiene-π-system. Whereas in the cation and the anion, it is largely localized on the two ‘outer’ five-membered rings.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19880710511
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  • 9
    Electronic Resource
    Electronic Resource
    A practical method for determining backscattering factors and matrix correction in quantitative aes analysis of binary alloys (1984)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 6 (1984), S. 48-55 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The composition-dependent backscattering factor in quantitative AES analysis is investigated by comparing experimental results from different approaches with several theoretical methods. Backscattering factor ratios are presented as a function of the composition of homogeneous CuPd alloys cleaned in situ by scribing. The values were calculated in a simple way by the proposed approximation method which takes into account the importance of the primary electron incident angle. This approach can be recommended for practical use in determining matrix correction. Application of the approximation method for matrix correction to different binary alloy systems gives a better agreement with the experimental matrix correction factor than Reuter's backscattering factor equation. Matrix correction factors for binary alloys were evaluated by a simple equation considering the weak linear composition dependence which was found experimentally. With matrix correction the accuracy of quantitative AES analysis can be improved by 5% or more as was shown for the CuPd alloys.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740060203
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  • 10
    Electronic Resource
    Electronic Resource
    Untersuchungen über Polyfructosane, LXII. Der Aufbau der Polyfructosane in der Gerste (1963)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 665 (1963), S. 191-195 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Wie im Roggen2) und Weizen3) konnten in junger Gerste Isokestose, Kestose, Bifurcose und ein Pentasaccharid als erste Stufen der Transfructosidierung auf Saccharose nachgewiesen werden. Der Aufbau der aus Gerstenhalmen isolierten und in ihrer Konstitution bereits bestimmten4) höchstmolekularen, verzweigten Polyfructosane, des Kritesins vom Inulintyp und des Hordeacins vom Phleintyp, vollzieht sich also analog wie im Roggen und Weizen: er geht aus von der Bifurcose, dem ersten verzweigten Oligosaccharid, und wird durch weitere Transfructosidierung entweder auf die erste oder sechste Hydroxylgruppe ihrer beiden endständigen Fructosereste in zwei parallelen Reihen bis zum Kritesin und Hordeacin fortgesetzt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19636650121
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