Diazepines, Part 28. Crystal and molecular structures of some dihydrodiazepinium salts and correlation with their reactivity and spectra

Abstract

The crystal and molecular structures of 6-bromo-5-methyl-7-phenyl-, 6-bromo-5,7-diphenyl- and 6-bromo-1,4-dimethyl-dihydrodiazepinium perchlorates have been determined. Some features of these structures, and of other recently determined structures of dihydrodiazepinium salts are discussed and compared with other properties, particularly the reactivity of 6-halogenodihydrodiazepinium salts towards nucleophiles, and the spectra and structure of 5,7-diphenyl derivatives.