Bicyclic sesquiterpenoids and diterpenoids in Australian crude oils

Details Bicyclic sesquiterpenoids and diterpenoids in Australian crude oils Bicyclic sesquiterpenoids and diterpenoids in Australian crude oils

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45.1173p&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 45, Issue 7, pp.1173-1180

Mathematics

Logic

4

Scientific paper

Bicyclanes previously reported only in heavily biodegraded Texas Gulf Coast crudes have been found to be ubiquitous in Australian crude oils of non-marine origin from four different basins. The compounds are present in oils, thought to be derived from the same or similar sources, that have undergone varying degrees of biodegradation. They are also found to be present in oils of different geological age. In addition a series of tricyclic diterpenoid hydrocarbons was common to four oils from the Gippsland Basin. Four of these compounds had the molecular formula C 20 H 34 and mass spectral fragmentation patterns suggested they were mono-unsaturated diterpenoids. The presence of unsaturated diterpenoids in crude oils appears to be a unique observation. It is proposed that the diterpenoids may be the source of the bicyclanes also observed in these oils.

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