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Hydrocarbons of adamantane series as indexes of petroleum catagenesis process

Hydrocarbons of adamantane series as indexes of petroleum catagenesis process. Petrov, A. A.; Aref'ev, O. A.In this study， 24139-37-5 and 1687-34-9 are also used.; Yakubson, E. V. (Inst. Geol. Process. Miner. Fuels, Moscow, USSR). Adv. Org. Geochem., Proc. Int. Meet., 6th, Meeting Date 1973, 517-22. Edited by: Tissot, B.; Bienner, F. Ed. Tech.: Paris, Fr. (English) 1974. CODEN: 33BJAS. DOCUMENT TYPE: Conference CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) The adamantane hydrocarbons in an oil indicate its degree of catagenesis. Concs. of C11-C13 tricycloalkanes were isolated from oils by thermal diffusion. The correlation of the adamantane hydrocarbons and the total tricyclic hydrocarbons was detd. by hydrocracking in a microreactor. The concn. of the adamantane hydrocarbons was 15-20% of the total tricyclic structures and this value was the same for all the oils. The adamantanes were the least thermodn. stable structures, e.g., 2-methyladamantane [700-56-1] 1,2- [16207-81-1] and 1,4-dimethyladamantane, 1-ethyl- [770-69-4] and 2-ethyladamantane [14451-87-7]. The explanation for the formation of the adamantane hydrocarbons is as follows: A -(k1).fwdarw. B -(k2).fwdarw. C (A = parent tricycloalkanes; B = tricyclic nonadamantane hydrocarbons; C = oil adamantane hydrocarbons; k1 .mchgt. k2). .