Nucleophilic substitution in ethyl fluorosulfonoxydifluoroacetate

Conclusions Ethyl fluorosulfonoxydifluoroacetate undergoes nucleophilic replacement with the formation of derivatives of difluoroacetic acid. The reaction with fluoride anion mainly features cleavage of the S-O bond leading to the acid fluoride of the monoethyl ester of oxalic acid.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1435–1437, June, 1985.     

Reaction of 1-fluoro-2-trifluoromethoxy-1,1,2-trichloroethane with fluorinating agents

Conclusions In the reaction of 1-fluoro-2-trifluoromethoxy-1,1,2-trichloroethane with different fluorinating systems, dehydrochlorination and fluorination products are formed. It is assumed that substitution of chlorine atoms by fluorine takes place by the elimination-addition mechanism.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1885–1887, August, 1984.     

A New Procedure for Preparing Perfluoroalkoxypropanoic Acid Fluorides

Condensation of perfluoro carboxylic acid fluorides with hexafluoropropene epoxide in the presence of N,N, N′,N′-tetraalkyldiaminomethanes was studied.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 3, 2005, pp. 438–440.Original Russian Text Copyright © 2005 by Igumnov, Lekontseva, Shipigusev, Mukhametshin.     

Distribution and Composition of Organic Matter in Oil- and Bitumen-cotaining Rocks in Deposits of Different Ages

The core samples of oil- and bitumen-containing rocks from Tatarstan's deposits of different ages were studied by thermal analysis methods (DTA, TG, DTG). Based on the obtained data, a procedure was elaborated for determining the enclosed organic matter content and the index of its fraction composition. A significant increase of the organic matter content in the core and its enrichment in high-molecular aromatic structures were shown to occur for the oil-containing rock samples when passing from the Devonian to Carboniferous and Permian deposits. The core samples of the Devonian oil-containing rocks may be divided into three groups: the samples taken from the zones where waste water flooding has been started relatively recently (1), or fresh water flooding has been carried on for a long time (2) and the samples of rock containing clay minerals as impurities. Thus, thermal analysis can be used in geochemical studies to identify the organic matter enclosed by oil- and bitumen-containing rocks. This revised version was published online in August 2006 with corrections to the Cover Date.     

Synthesis and copolymerization of azidomethyl-substituted oxetanes: the morphology of statistical block copolymers

Chemistry of Heterocyclic Compounds - 3,3-Bis(azidomethyl)oxetane and 3-azidomethyl-3-methyloxetane were obtained by bromination of pentaerythritol and metriol with a mixture of hydrobromic,...     

Effect of nature of halide ions on oligomerization of hexafluoropropylene oxide

Conclusions The average degree of hexafluoropropylene oxide oligomerization depends on the nature of the halogen in the initiator and decreases for the potassium halides in the order: F, Cl, Br, I.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1891–1893, August, 1983.     

Some peculiarities of the cyclization of N-polynitroalkyl-N-nitrosoaminoacetic acids and their nitriles to sydnones and sydnonimines

The cyclization of N-polynitroalkyl-N-nitrosoaminoacetic acids to sydnones occurs only under the influence of trifluoroacetic anhydride. Closing to a sydnonimine ring does not occur in the case of N-(2,2,2-trinitroethyl)-N-nitrosoaminoacetonitrile, but N-(2,2,2-trinitroethyl)-N-nitrosoiminoacetic acid imino ester is formed. Removal of the nitro groups in the γ position relative to the nitrosoamino group leads to normal occurrence of the reaction to give polynitroalkylsydnonimines.