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  • Chemistry  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Synthese und Kernresonanzuntersuchungen asymmetrisch substituierter Methylencyclopropene. Ein Beitrag zur inneren Rotation um die C-3/C-4-Bindungsachse im Methylencyclopropen-System (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2647-2666 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and n. m. r. Spectroscopical Investigation of Asymmetrically Substituted Methylene CyclopropenesThe synthesis of asymmetrically substituted methylene cyclopropenes (e. g. 3-(diacylmethylene)-cyclopropenes 11 and 12, cyclopropenylideneanthrones 14 and other derivatives (19, 21)) and investigation of the temperature dependence of their 1H-n.m.r. spectra are reported. The variation of ΔGc≠-values with structural changes and solvent polarity is systematically investigated and the possibility of assigning a configuration to the observed rotational isomers is discussed.
    Notes: Asymmetrisch substituierte Methylencyclopropene (3-Diacylmethylen-cyclopropene 11 und 12, Cyclopropenyliden-anthrone 14 und andere Derivate (19, 21)) werden synthetisiert und ihre 1H-NMR-Spektren bei verschiedenen Temperaturen gemessen. Die Abhängigkeit der erhaltenen ΔGc≠-Werte von Struktur- und Solvensparametern wird systematisch untersucht und die Möglichkeit einer Konfigurationszuordnung der beobachteten Rotationsisomeren diskutiert.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030835
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  • 2
    Electronic Resource
    Electronic Resource
    Mass spectra of polymeric thioformaldehydes (CH2S)3, (CH2S)4, (CH2S)5 and (CH2S)x (1975)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 10 (1975), S. 781-786 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectral fragmentations of various thioformaldehydes, 1,3,5-trithiacyclohexane, 1,3,5,7-tetrathiacyclooctane, 1,3,5,7,9-pentathiacyclodecane and a polymeric form (CH2S)x have been examined. The principal features of the spectra are reported. The fragmentation occurred by fracture of the ring in the cyclic compounds with or without rearrangement.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210100914
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