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  • 1
    Electronic Resource
    Electronic Resource
    The loss of CO and HCN in the fragmentation of isatin and the methyl isatins (1971)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 5 (1971), S. 759-760 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 3-13C-Isatin has been shown to eliminate the 2-carbonyl group as the initial fragment, followed predominantly by loss of HCN. In 4-, 5-and 6-methyl-isatin the loss of the second carbonyl group competes evenly with HCN loss, whilst the 7-methyl isomer fragments almost exclusively by successive loss of two molecules of CO from the molecular ion.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210050616
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  • 2
    Electronic Resource
    Electronic Resource
    The Loss of a hydroxyl group from the molecular ions of alkylnitrobenzenes (1979)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 14 (1979), S. 448-454 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: It is confirmed that the loss of HO· from the molecular ion of o-nitrotoluene involves exclusively a hydrogen from the methyl group. However, in higher homologues hydrogen atoms from non-benzylic sites are also implicated. With such compounds this fragmentation mode is shown not only by the ortho but, to a lesser extent, by the meta and para isomers as well. The proportion of the total ion current borne by the [M - 17]+ ion follows the order ortho 〉 meta 〉 para, which is attributed to substituent migration around the ring with a hydroxyl radical only being lost when the groups are on adjacent ring atoms. Other ions present in the spectra point to interaction between substituents to form a new heterocyclic ring.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210140811
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  • 3
    Electronic Resource
    Electronic Resource
    The Raman spectrum of allene (1973)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 1 (1973), S. 393-414 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The rotational Raman spectrum of allene has been obtained using a Fabry-Perot etalon. Vibration-rotation spectra of ν1, ν5, ν8 have been photographed at a resolution of 0.3 cm-1, using a 1 m spectrograph.Analysis yielded a number of molecular constants including A0 and Dk.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250010412
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  • 4
    Electronic Resource
    Electronic Resource
    Mobility of radicals in zeolite catalysts: Molecular motion studied by muon spectroscopy (1995)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 33 (1995), S. S134 
    Details
    ISSN: 0749-1581
    Keywords: radicals ; zeolite ; muon ; mobility ; catalysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Activation parameters for the surface dynamics of radicals produced by the addition of muonium to the unsaturated organic substrates cyclopentene, benzene, tetramethylethylene [2,3-dimethylbut-2-ene (TME)] and 2,3-dimethylbuta-1,3-diene (DMBD) adsorbed in the zeolites Na-mordenite and NaX and on silica have been determined by means of transverse-field muon spin rotation spectroscopy. This allows the study of the influence of adsorption by the different surfaces on these parameters. The temperature dependences of the muon hyperfine couplings were also studied and were found to be highly sensitive to the type of catalyst, and so to the nature of the adsorption site.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260331321
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