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Substituent and H/D Randomization in the Mass Spectra of Substituted Diphenylacetylenic Compounds,
NATIONAL RESEARCH COUNCIL OF CANADA HALIFAX (NOVA SCOTIA) ATLANTIC REGIONAL LAB
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The mass spectra of several substituted diphenylacetylenes are reported and the metastable iondaughter ion ratios for the isomeric chloro- and bromodiphenylacetylenes suggested substituent scrambling in their respective molecular ions. The fragmentation patterns for the amino- and nitrodiphenylacetylenes differed somewhat from most other aromatic amino and nitro compounds. The mass spectra of several deuterated substituted diphenylacetylenes clearly showed extensive but not complete HD equilibration in the molecular ion or some subsequent decomposition ion. Modified author abstract
APPROVED FOR PUBLIC RELEASE