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A NOVEL SEDIMENTARY METALLOCHLORIN

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Publication details

JournalOrganic Geochemistry
DatePublished - 1990
Issue number4-6
Volume16
Number of pages7
Pages (from-to)1059-1065
Original languageEnglish

Abstract

The major chlorin in Messel oil shale (Eocene, lacustrine, F.R.G.) has been isolated and assigned as the nickel complex of mesopyrophaeophorbide a by spectral comparison with a synthesised standard. The component, whose structure clearly indicates a chlorphyll origin and which co-occurs with its free-base counterpart, has the same carbon skeleton as the major nickel porphyrin acid assigned previously, but is present in much lower abundance and still retains the C-13(1) carbonyl group found in all chlorophylls. It appears that mesopyrophaeophorbide a represents the major part of the residual chlorin fraction which has survived aromatisation and carbonyl reduction and, like the alkyl porphyrins and carboxylic acids, has become metallated with nickel.

    Research areas

  • CHLORINS, MESOPYROPHAEOPHORBIDE-A, MESSEL SHALE, NICKEL MESOPYROPHAEOPHORBIDE-A, NUCLEAR MAGNETIC RESONANCE OF CHLORINS, OIL-SHALE, PORPHYRINS

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