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  • 1
    Electronic Resource
    Electronic Resource
    Mass spectra of organometallic compounds - XIII: Metal carbonyl complexes of tris(dimethylamino)arsineFor Part XII of this series see reference 1. (1971)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 5 (1971), S. 939-944 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of the tris(dimethylamino)arsine metal carbonyl complexes [(CH3)2N]3-AsM(CO)5 (M = Cr, Mo and W), trans-[(CH3)2N]3AsCr(CO)4As[N(CH3)2]3 and [(CH3)2N]3-AsFe(CO)4 were examined and compared with those of the corresponding tris(dimethylamino)-phosphine complexes. The molecular ions in the mass spectra of the tris(dimethylamino)arsine complexes have a greater tendency to eliminate a (CH3)2N fragment than the molecular ions in the mass spectra of the corresponding tris(dimethylamino)phosphine complexes. The mass spectrum of the tungsten derivative [(CH3)2N]3AsW(CO)5 exhibits not only the usual series of ions [(CH3)2N]3-AsW(CO)n+ and [(CH3)2N]2AsW(CO)n[+ but also the series of ions (CH3)2NAsW(CO)n]+ (n = 5, 4, 3, 2, 1 and 0) and even the nitrogen-free ions [AsW(CO)n]+ (n = 2, 1 and 0). Metastable ion evidence was obtained for arsine (AsH3) elimination from the [(CH3)2N]2AsFeH+ ion in the mass spectrum of [(CH3)2N]3AsFe(CO)4.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210050805
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  • 2
    Electronic Resource
    Electronic Resource
    Mass spectra of organometallic compoundsFor part VI of this series see R. B. King, Can. J. Chem. 47, 559 (1969). - VII; Organonitrogen derivatives of metal carbonyls (1969)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1969), S. 387-399 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The positive-ion mass spectra of the following organonitrogen derivatives of metal carbonyls are discussed: (i) The compounds NC5H4CH2Fe(CO)2C5H5, NC5H4CH2COMo(CO)2C5H5, NC5H4CH2W(CO)3C5H5, NC5H4CH2COMn(CO)4, C5H10NCH2CH2Fe(CO)2C5H5, (CH3)2NCH2CH2COFeCOC5H5 and (CH3)2NCH2CH2COMn(CO)4 obtained from metal carbonyl anions and haloalkylamines, (ii) The isocyanate derivative C5H5Mo(CO)3CH2NCO; (iii) The arylazomolybdenum derivatives RN2Mo(CO)2C5H5 (R = phenyl, p-tolyl, or p-anisyl); (iv) The compound (C6H5N)2COFe2(CO)6 obtained from Fe3(CO)12 and phenyl isocyanate; (v) The N,N,N′,N′-tetramethylethylenediamine complex (CH3)2NCH2CH2N(CH3)2W(CO)4. Further examples of eliminations of hydrogen, CO, and C2H2 fragments were noted. In addition evidence for the following more unusual processes was obtained: (i) Elimination of HCN fragments from the ions [NC5H4CH2MC5H5]+ to give the ions [(C5H5)2M]+ (M = Fe, Mo and W); (ii) Conversion of C5H5Mo(CO)3CH2NCO to C5H5Mo(CO)2CH2NCO within the mass spectrometer; (iii) Elimination of N2 from [RN2MoC5H5]+ to give [RMoC5H5]+; (iv) Novel eliminations of HNCO, FeNCO, and C6H5NC fragments in the mass spectrum of (C6H5N)2COFe2(CO)6; (v) Facile dehydrogenation of the N,N,N′,-N′-tetramethylethylenediamine ligand in the complex (CH3)2NCH2CH2N(CH3)2W(CO)4.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210020407
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  • 3
    Electronic Resource
    Electronic Resource
    Mass spectra of organometallic compounds - VIII. Some transition metal organometallic halide derivativesFor Part VII of this series see R. B. King, Org. Mass. spectrom. 2, 387 (1969). (1969)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1969), S. 401-412 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The positive ion mass spectra of the transition metal organometallic halide derivatives C5H5M(CO)3Cl(M = Mo or W), C7H7W(CO)2I, C3H5Fe(CO)3I, [C3H5PdCl]2, and [C5H5Mo(NO)I2]2 have been investigated. Further examples of the elimination of CO and C2H2 fragments were noted. In addition the following effects of particular interest were observed:(i) Evidence in the mass spectra of the chlorides for reactions with adventitious iodine and even bromine present in the mass spectrometer; (ii) Evidence for conversion of the compounds C5H5Mo(CO)3X to the new halides [C5H5Mo(CO)X]2 upon pyrolysis; (iii) Evidence for facile losses of the π-allyl group, the iodine atom, and methyl iodide in the mass spectrum of the π-allyl derivative C3H5Fe(CO)3I; (iv) Evidence for loss of iodine upon introducing [C5H5Mo(NO)I2]2 into the mass spectrometer to give ions derived from [C5H5Mo(NO)I]2.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210020408
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  • 4
    Electronic Resource
    Electronic Resource
    Mass spectra of organometallic compounds - IX: Compounds with metal-metal bondsFor Part VIII of this series see Ref. 1. For a preliminary communication of some of this work see Ref. 2. Portions of this work were presented to the Division of Inorganic Chemistry at the 151st meeting of the American Chemical Society, Pittsburgh, Pennsylvania, March, 1966, paper H45. (1969)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1969), S. 657-679 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of the following compounds have been investigated: (i) The organotin derivatives (CH3)3SnMo(CO)3C5H5 and (CH3)3SnNCW(CO)5; (ii) The mercury derivatives Hg[Mn(CO)5]2, Hg[Co(CO)4]2, Hg[Mo(CO)3C5H5]2 and ClHgMo(CO)3C5H5; (iii) The polynuclear cyclopentadienyl metal derivatives [C5H5Ru(CO)2]2, [C5H5Cr(CO)3]2, [C5H5Cr(NO)2]2 and [C5H5Fe-CO]4; (iv) The trinuclear cobalt carbonyl derivatives YCCo3(CO)9 (Y = Cl and CH3); (v) The binuclear triene-iron carbonyl derivatives C4H4Fe2(CO)6 and C8H10Fe2(CO)6. The mass spectra of the trimethyltin derivatives exhibited stepwise loss of methyl groups as well as of carbonyl groups. The mass spectra of the mercury derivatives exhibited the facile loss of mercury. The mass spectrum of [C5H5Cr(CO)3]2 indicated a very weak chromium-chromium bond since it exhibited no ion containing two chromium atoms. The mass spectrum of the nitrosyl derivative [C5H5Cr(NO)2]2 exhibited the stepwise loss of its four nitrosyl groups. The mass spectrum of [C5H5FeCO]4 was rather complex and exhibited a variety of unusual processes including eliminations of neutral Fe and C5H5Fe fragments. Unusual ions observed in the mass spectrum of CH3CCo3(CO)9 include the bare polymetallic ions [Con]+ (n = 3 and 2). Many examples of the elimination of neutral CO, C2H2 and H2 fragments were noted in this work.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210020702
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  • 5
    Electronic Resource
    Electronic Resource
    Mass spectra of organometallic compounds-XI: Pyrrolyl, indenyl and fluorenyl derivatives of manganese carbonylFor part X of this series see reference 1. (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 3 (1970), S. 1227-1232 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The positive ion mass spectra of the π-pyrrolyl derivatives C4H4NMn(CO)2L (L = (C6H5)3E or CO; E = P, As, or Sb), the π-indenyl derivatives C9H7Mn(CO)2L (L = (C6H5)3E or CO; E = P, As, or Sb) and the π-fluorenyl derivatives C13H9Mn(CO)2L (L = (C6H5)3P or CO) have been investigated. The relative tendencies of ions of the type [QMnE(C6H5)3]+ (Q = π-pyrrolyl, π-indenyl, or π-fluorenyl; E = P, As, or Sb) to fragment by losses of the Q ring system and the (C6H5)3E ligand are compared. Phenyl transfers from phosphorus, arsenic, or antimony to manganese to form relatively high abundances of [C6H5Mn]+ are also observed. Other processes typical of metal carbonyl derivatives (CO losses), aromatic derivatives (C2H2 eliminations) and (C6H5)3E derivatives (phenyl losses, conversion of [(C6H5)3E]+ directly to [C6H5E]+, and formation of [C12H8E]+ 9-heterofluorenyl ions) are observed in these mass spectra and are supported in many cases by the presence of appropriate metastable ions.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210031002
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  • 6
    Electronic Resource
    Electronic Resource
    Mass spectra of organometallic compounds-XII: Tetraphenylcyclobutadiene derivativesFort Part XI of this series see reference 1. (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 3 (1970), S. 1233-1237 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of the tetraphenylcyclobutadiene complexes (C6H5)4C4Fe(CO)3, C5H5CoC4(C6H5)4 and C9H7CoC4(C4H5)4 are reported. Evidence is presented for the loss of the tetraphenylcyclobutadiene ring by a two-step sequence involving successive losses of two (C6H5)2C2 fragments. Significant differences are observed in the fragmentations of the monopositive and dipositive molecular ions of C9H7CoC4(C6H5)4.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210031003
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  • 7
    Electronic Resource
    Electronic Resource
    Mass spectra of organometallic compounds: XIVFor part XIII of this series, see Ref. 1. - Some monometallic olefing manganese tricarbonyl derivatives (1974)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 9 (1974), S. 189-194 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The metastable ion supported fragmentation process in the mass spectra of the cyclohexadienyl derivative C6H7Mn(CO)3, the cycloheptadienyl derivative C7H9Mn(CO)3, the 1,2,3,4,5-and 1,2,3,5,6-pentahaptocyclootadienyl derivatives C8H11Mn(CO)3, the cyclooctatrienyl derivative C8H9Mn(CO)3 and the substituted cyclopentadienyl derivative (CH3)2NCH2C5H4Mn(CO)3, are described. Losses of carbonyl groups, generally stepwise, from the molecular ions to give the corresponding [M - 3CO]+· ions are first observed. Further fragmentation of the carbonyl-free [M - 3CO]+· ions can involve a variety of processes such as the following: (a) elimination of a neutral manganese atom to give a hydrocarbon fragment; (b) elimination of a neutral hydrocarbon fragment to give an [MnH]+· ion; (c) dehydrogenation; (d) elimination of a 2-carbon C2H2 or C2H4 fragment; (e) elimination of a C3H4 or C3H6 fragment as a neutral species when it is bridging two carbon atoms bonded to manganese, as in C8H9Mn(CO)3 and 1,2,3,4,5,h5-C8H11Mn(CO)3, respectively. Fragmentation of the [M - 3CO]+· ion in (CH3)2NCH2C5H4Mn(CO)3 presents the following additional features: (a) elimination of C6H6 with a nitrogen shift from carbon to manganese; (b) elimination of a neutral dimethylamino fragment to give [C6H6Mn]+·, which then loses neutral C6H6, C6H5 or Mn fragments and thus is formulated tentatively as [(fulvene)Mn]+· or [C6H5MnH]+· rather than [(benzene)Mn]+·.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210090206
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  • 8
    Electronic Resource
    Electronic Resource
    Mass spectra of some neopentylphosphorus derivatives (1976)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 11 (1976), S. 148-153 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The fragmentation patterns and major metastable ions of the mass spectra of the neopentyl-phosphorus derivatives [(CH3)3CCH2]3P, [(CH3)3CCH2]2P(O)H, [(CH3)3CCH2]nPX3-n (n = 1 and 2; X = H, Cl, C6H5 and CH = CH2), [(CH3)3CCH2]3PS, [(CH3)3CCH2]nP(S)R3-n (n = 1 and 2; R = C6H5 and CH = CH2), [(CH3)3 CCH2]2PCH2CH2P[CH2C(CH3)3]2, ([CH3)3CCH2]2PCH2PCH2-CH2P(H)C6H5 and [(CH3)3CCH2]2PCH2CH2P(S)(CH3)2 are described. Fragmentation of a neopentyl group by elimination of either C4H8 or CH3 is very favourable when the neopentyl group is bonded to either a tricoordinate or tetracoordinate phosphorus atom. In neopentylphosphines with two or three neopentyl groups, stepwise elimination of C4H8 from all of the neopentyl groups occurs very readily. The resulting [(CH3)nPX]+.3-n ions are often the most intense ions in the mass spectra.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210110209
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  • 9
    Electronic Resource
    Electronic Resource
    Loss of sulphur during irradiation of X-ray spectrometric standards prepared using cellulose and poly(vinyl alcohol) (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 8 (1979), S. 9-10 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A loss of sulphur Kα intensity was observed during irradiation of pellets containing some sulphur compounds in organic binders. For elemental sulphur and dibenzyl disulphide mixed with either cellulose or poly(vinyl alcohol), the loss of intensity is attributed to loss of sulphur following reaction with hydrogen produced by radiolysis of the organic binder. No such loss is observed from potassium aluminium sulphate in either binder. The rate of loss of sulphur per unit of energy absorbed by the sample accords with published values for hydrogen production by radiolysis of carbohydrates and alcohols.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300080105
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