C 74 Complexes of crown ethers with perfluorocarboxylic acids and their thermal decarboxylation [Electronic resource] / A. V. Podol'skii, T. G. Khonina, O. V. Koryakova, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1993. - Vol. 42, № 6. - P1052-1055 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Crown ethers form strong proton-acceptor complexes with CF3COOH or C4F9COOH that undergo thermal decarboxylation at 200–260 °C which results in 60–80% of CF3H or C4F9H (including up to 20 % of a mixture of C4F8). Critical parameters of the process were determined in relation to the temperature and amount of crown ether. The relative activities of different crown ethers in decarboxylation were also established. A scheme is proposed that explains the effect of the structure of crown ethers on this reaction. The data obtained substantiate the view that the topological correspondence concept is insufficient to explain the ability of crown ethers to form complexes with cat \\\\Expert2\\nbo\\Russian Chemical Bulletin\\1993, 42 (6), 1052.pdf |