1,1′-Disubstituted 2,2′-di(n-perfluoropropyl)-5,5′-bibenzimidazolyls |
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Authors: | G. I. Braz I. E. Kardash V. V. Kopylov A. F. Oleinik G. G. Rozantsev A. N. Pravednikov A. Ya. Yakubovich |
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Affiliation: | (1) Khar'kov Physicochemical Institute, Moscow |
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Abstract: | The synthesis of 4,4-di(methylamino)- and 4,4-dianilino-3,3-diaminobiphenyls is described. The condensation of the tetraaminobiphenyls mentioned with phenyl perfluorobutyrate has given, respectively, 1,1-dlmethyl- and 1,1-diphenyl-2,2-(n-perfluoropropyl)-5, 5-bibenzimidazolyls. A study of the thermal stability of the 2-perfluoroalkylbenzimidazoles has shown that the replacement of the hydrogen of the imino group in these compounds by a methyl or a phenyl radical considerably increases their heat stability. |
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