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Title: The Treibs hypothesis: An evaluation based on structural studies

The Treibs hypothesis: An evaluation based on structural studies The Treibs hypothesis linking sedimentary 13,15-ethanoporphyrins to an origin from chlorophylls requires the natural occurrence of a suite of intermediates on the proposed degradative pathway. The hypothesis was suggested over 50 years ago, yet despite the now extensive literature on the structural characterization of sedimentary porphyrins, few of the putative intermediates have been isolated and identified. Through examination of the tetrapyrrole distributions of three selected sediments, the authors have now assigned the minimum number of intermediates necessary for the operation of a pathway of defunctionalization, linking a precursor such as chlorophyll a to a sedimentary porphyrin with the same carbon skeleton (deoxophylloerythroetioporphyrin). This provides further structural evidence for the defunctionalization of chlorophylls to give sedimentary 13,15-ethanoporphyrins.
Authors: ; ;
OSTI Identifier:OSTI ID: 6125924
Resource Type:Journal Article
Resource Relation:Journal Name: Energy and Fuels; (USA); Journal Volume: 4:6
Country of Publication:United States
Language:English
Subject: 02 PETROLEUM; PORPHYRINS; ORIGIN; STRUCTURAL CHEMICAL ANALYSIS; ABSORPTION SPECTROSCOPY; AROMATIZATION; CHLORINS; CHLOROPHYLL; DECARBOXYLATION; DEMETALLIZATION; ESTERIFICATION; HYDROGEN 1; LIQUID COLUMN CHROMATOGRAPHY; MASS SPECTROSCOPY; MOLECULAR STRUCTURE; NUCLEAR MAGNETIC RESONANCE; PETROLEUM; REACTION INTERMEDIATES; REDUCTION; SEDIMENTS; SOURCE ROCKS; SPECTROPHOTOMETRY; AROMATICS; CARBOXYLIC ACIDS; CHEMICAL REACTIONS; CHROMATOGRAPHY; ENERGY SOURCES; FOSSIL FUELS; FUELS; HETEROCYCLIC ACIDS; HETEROCYCLIC COMPOUNDS; HYDROGEN ISOTOPES; HYDROXY COMPOUNDS; ISOTOPES; LIGHT NUCLEI; MAGNETIC RESONANCE; NITROSO COMPOUNDS; NUCLEI; ODD-EVEN NUCLEI; ORGANIC ACIDS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PHENOLS; PHYTOCHROMES; PIGMENTS; POLYPHENOLS; PROTEINS; RESONANCE; SEPARATION PROCESSES; SPECTROSCOPY; STABLE ISOTOPES 023000* -- Petroleum-- Properties & Composition; 020200 -- Petroleum-- Reserves, Geology, & Exploration