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Study of aromatic biomarkers in brown coal extracts

✍ Scribed by István Hazai; Gábor Alexander; Tamás Székely

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
662 KB
Volume
68
Category
Article
ISSN
0016-2361

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✦ Synopsis

Gas chromatographic mass spectrometric (g.c.-ms.) analysis or aromatic hydrocarbon fractions of 10 brown coal samples has shown the predominance of pentacyclic compounds. Some tetracyclic compounds were also detected. They appeared to be diagenetically related to triterpenoids naturally occurring in the biosphere. Diagenetic aromatization of triterpenoids having a six-membered E ring mainly follow a pathway in which dehydrogenation proceeds from ring A to E. A set of reactions involving C ring cleavage is also an omnipresent process. Aromatization including an A ring cleavage played a minor role.

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