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  • 1
    Digitale Medien
    Digitale Medien
    Mechanisms Of Epoxide Reactions (1959)
    s.l. : American Chemical Society
    Chemical reviews 59 (1959), S. 737-799 
    Details
    ISSN: 1520-6890
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/cr50028a006
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Pressure effects on proton tunnelling (1977)
    [s.l.] : Nature Publishing Group
    Nature 268 (1977), S. 372-372 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Nature Vol. 268 28 July 1977 Ph2C N2 + PhCOOH (D)-(0 Ph2CH(D)-N2+ fast Ph2CH(D) PhCO" PhCO (I) OH(D) Ar = Me2NC6H4 In the butyl ether solvent used, reaction (1) exhibits an isotope effect which is in the normal region (kn/ko = 4.5), that is, accountable in terms of differences in ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/268372a0
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  • 3
    Digitale Medien
    Digitale Medien
    Degenerate skeletal rearrangement and energy partitioning in the fragmentation of the norbornyl cation (1974)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 9 (1974), S. 510-513 
    Details
    ISSN: 0030-493X
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The electron-impact-induced fragmentation of a 13C labelled exo-2-norbornyl chloride has been studied. When the norbornyl cation, [C7H11]+, [M - Cl], dissociates by elimination of C2H4, carbon atoms are randomly lost showing that extensive skeletal rearrangement (in addition to the complete hydrogen atom scrambling reported earlier) has taken place in the norbornyl cation prior to dissociation.The metastable ion peak associated with the above fragmentation consists of superimposed gaussian and flat-top components; it is proposed that these correspond to the formation of isomeric [C5H7]+ daughter ions whose heats of formation differ by ∼0.4 eV.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/oms.1210090508
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  • 4
    Digitale Medien
    Digitale Medien
    The mass spectra of carboxylic acids - I: Fragmentation mechanisms in maleic and fumaric acids and related compounds (1969)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1969), S. 591-601 
    Details
    ISSN: 0030-493X
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The mass spectra of maleic acid, maleic acid-2,3-d, fumaric acid and fumaric acid-2,3-d have been examined and fragmentation mechanisms are proposed for these compounds. The molecular ion of the cis-acid fragments via H atom transfer from one carboxyl group to the other followed by loss of CO2. The trans acid does not fragment significantly by this route and the former effect may be characteristic of molecules containing two carboxyl groups cis-oriented to each other. This hypothesis was successfully tested by examining the mass spectra of citraconic, itaconic and phthalic acids. Itaconic and mesaconic acids show some of the fragmentation characteristics of fumaric acid.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/oms.1210020605
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