Abstract

Upon reaction of 1,3,5-triphenyl- and 1,3,5-triphenyl-5-methyl-2-pyrazolines with antimony pentachloride in acetonitrile they undergo oxidation to cation radicals, which subsequently undergo rapid dimerization at the para positions of the N-phenyl groups. The final products are 4,4′-bis(3,5-diphenyl-2-pyrazolin-1-ia)- and 4,4′-bis(3,5-diphenyl-5-methyl-2-pyrazolin-1-ia)bis(cyclohexa-2,5-dienylidene) hexachloroantimonates.

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