Synthesis and thermochemical properties of some fluorine-containing formals |
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Authors: | V. V. Avdonin E. P. Kirpichev Yu. I. Rubtsov M. A. Fadeev G. V. Oreshko L. T. Eremenko |
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Affiliation: | 1. Institute of Chemical Physics, Academy of Sciences of the USSR, Chernogolovka
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Abstract: | Fluorination of bis(2-fluoro-2,2-dinitroethyl) and bis(2,2,2-trinitroethyl) thionocarbonates by elemental fluorine gave bis(2-fluoro-2,2-dinitroethyl) and bis(2,2,2-trinitroethyl) difluoroformals. The reaction of 2,2,2-trinitroethyl nitrate with 2-fluoro-2,2-dinitroethyl chloromethyl ether gave 2-fluoro-2,2-dinitroethyl 2,2,2-trinitroethyl formal. The standard heats of combustion and formation of the synthesized formals were determined by combustion in a calorimetric bomb. Increments of substitution of the trinitromethyl group by the fluorodinitromethyl group and of the H atom by F in the methylene group for formals were calculated and recommended for rough calculations. It was shown that it is possible to evaluate Hf0 of the formals by the method of increments and group contributions.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2513–2517, November, 1991. |
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