Synthesis, spectra, and crystal structure of 6,7,14,15-tetrahydrobis-benzimidazo[1,2-a;1′,2′-e][1,5]diazocine

Abstract

2-[2-(4-Methylpyridinio)ethyl]benzimidazole (7a) and its 5,6-dimethyl derivative (7b) are converted by pyridine into cyclic dimers (8a and b), the spectra of which are described. An X-ray diffraction study of the tetrahydrobis-benzimidazodiazocine (8a) has verified the molecular structure. © Royal Society of Chemistry.