Petroporphyrins—II: The presence of porphyrins with extended alkyl substituents |
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| Authors: | J. Martin E. Quirke George J. Shaw Paul D. Soper James R. Maxwell |
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| Affiliation: | University of Bristol, School of Chemistry, Organic Geochemistry Unit, Cantock''s Close, Bristol, BS8 1TS, England |
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| Abstract: | The vanadyl porphyrins from Boscan oil (Cretaceous, W. Venezuela) were isolated as 3 fractions, and degraded to maleimides (1H-pyrrole-2,5-diones) by chromic acid. Analysis of the products by GC-MS, using multiple ion detection to enhance sensitivity, revealed a major homologous series of 3-Me components with n-alkyl side chains extending to C11, and a minor series with branched alkyl side chains, the Me branch being at C-1. The origin of the extended alkyl groups is discussed. |
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