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'co Diphenylalkanes' in keywords
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1979 (1)
1Author    Dietmar Kuck, Hans-Friedrich GrützmacherRequires cookie*
 Title    Der Einfluß der Kettenlänge auf die massenspektrometrigche Fragmentierung höherer l.co-Diphenylalkane The Influence of the Chain Length on the Mass Spectrometric Fragmentation of Higher 1, co-Diphenylalkanes  
 Abstract    The mass spectrometric fragmentation of l,co-diphenylalkanes (2 < co < 22) has been studied in order to elucidate the effect of the chain length on the reactions of unstable and metastable molecular ions with respect to the occurrence of internally solvated ions in the gas phase. The unstable molecular ions of all l,co-diphenylalkanes react predominantly by formation of C?H7+ and C7Hg + " ions, the latter ones are also formed by metastable molecular ions. Neither the variation of the relative abundances of these fragment ions with the chain length nor the fragmentation of specifically deuterated molecular ions indicate any internal solvation in the reacting ions. Inspite of the localized activated C-H bonds at the benzylic positions, these "activated" H atoms are not involved in intra-molecular hydrogen exchange reactions or the formation of C7Hs + ' ions (with the exception of co = 3). Especially the higher homologues (co > 12) react very similarly to the molecular ions of 1-phenylalkanes, while the fragmentation of the lower homologues (co < 6) is determined by specific ("vinculoselective") competitive reactions, e.g. loss of CvH?' and CsHs. 
  Reference    Z. Naturforsch. 34b, 1750—1764 (1979); eingegangen am 12. Juli 1979 
  Published    1979 
  Keywords    Mass Spectrometry, 1, co-Diphenylalkanes 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1750.pdf 
 Identifier    ZNB-1979-34b-1750 
 Volume    34