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  • 1
    Electronic Resource
    Electronic Resource
    Computer-aided mass spectrometric identification of steroisomeric monosaccharides (1972)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 94 (1972), S. 2542-2544 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00762a076
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Total lonization Cross-section of some Tetra Alkyl Metal Compounds (1967)
    [s.l.] : Nature Publishing Group
    Nature 216 (1967), S. 260-261 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The static polarizability for an atom is, according to Slater3, a=2/h (1) where \Mao\ is the a0'th element of the dipole moment matrix and vao is the frequency corresponding to the transition between the states 0 (ground state) and a. Using the Bethe-Born approximation, Mott and Massey4 derived ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/216260a0
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  • 3
    Electronic Resource
    Electronic Resource
    Modified stepwise expansion method for the measurement of compressibility isotherms of gases up to 10 kbar (1990)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 1153-1154 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The stepwise expansion method for the measurement of compressibility isotherms of gases, developed recently in this laboratory, has been modified in order to measure those gases for which only low-pressure fiducial density data are available. The modified method has been tested with CH4 as a measuring gas at 298.15 K and up to 9.9 kbar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141440
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  • 4
    Electronic Resource
    Electronic Resource
    On the mass spectra of some alkyl digermanium compounds (1968)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 1 (1968), S. 647-657 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This paper reports the monoisotopic mass spectra of the compounds (CH3)Ge—Ge(CH3)3,(C2H5)3Ge—Ge(C2H5)3 and (CH3)3Ge—Ge(C2H5)3. With the aid of metastable ion transitons and appearance potentials the fragmentation patterns can be given.The dominant reactions are explained in terms of the valence of the metal atom. According to the valence rule the possibility of forming an ion in which two germanium atoms are bonded to five other groups (alkyl or hydrogen) determines greatly the spectra, while successive elimination of the methyl groups appears to be difficult and elimination of the ethyl groups is a predominant process.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210010506
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  • 5
    Electronic Resource
    Electronic Resource
    Metal-metal chelate exchange reactions in the ion source of a mass spectrometer (1971)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 5 (1971), S. 1127-1129 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In the mass spectra of several transition metal chelates with diethyldithiocarbamate as a ligand, intense peaks are present which could be assigned to extraneous metal (particularly nickel) containing ions. Using an Au-Rh coated ion source, evidence was obtained for the occurrence of exchange reactions in the region of the filament assembly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210050915
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  • 6
    Electronic Resource
    Electronic Resource
    The electron-impact-induced fragmentation of n-alkyl cyanides (1969)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1969), S. 1103-1115 
    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 alkyl cyanides up to n-pentyl cyanide were studied. Using metastablel ion transitions, appearance potentials and deuterium labelling, the fragmentation patterns, spectral characteristics and trends for this series can be given. The investigation of labelled compounds demonstrates the specificity of rearrangement and normal decomposition processes. Alkyl ions in nitriles are produced by simple cleavage of the carbon-carbon bond, while ions of the type [M -alkyl]+, which at the first sight could originate in the same way, are presumably formed via cyclic intermediates and are in fact rearrangement ions.Apart from the known γ and δ-hydrogen rearrangements, there is novel evidence for a β-hydrogen rearrangement via a five-membered ring transition state.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210021108
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  • 7
    Electronic Resource
    Electronic Resource
    The electron-impact-induced fragmentation of some alkyl isocyanides and α-branched alkyl cyanides (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 3 (1970), S. 1439-1456 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The HRP mass spectra of some alkyl isocyanides (R—NC in which R equals CH3, C2H5, n-C3H7, n-C4H9 and t-C4H9) and two methyl branched alkyl cyanides (R—CN in which R equals i-C3H7 and t-C4H9) have been studied. Using metastable ion transitions and appearance potentials, the fragmentation patterns and spectral characteristics of the isocyanides can be given. A comparison has been made with the mass spectral data of the corresponding cyanides.Although the mass spectra of alkyl cyanides and isocyanides show close relationship, evidence could be obtained that this resemblance is not caused by rearrangement of the isocyanide into cyanide molecules. The main difference between the spectra of both compounds is caused by the strength of the α-bond, being weaker in the case of the isocyanides. The abundance of ions formed by α-bond cleavage decreases with increasing size of the alkyl group.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210031113
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