Preparation of bisannulated salts of 2, 2'-biimidazole, 2-(2'-imidazolyl) benzimidazole, 2, 2'- bibenzimidazole, and annulated salts of 1, 1'-dimethyl-2, 2'-biimidazole, 1, 1'-dimethyl-2-(2'- imidazolyl) benzimidazole, and 1, 1'-dimethyl-2, 2'-bibenzimidazole is accomplished by direct alkylation of the parent azaheterocycle with excess 1, n-dihaloalkane. Discussions of the product conformations use electronic absorption spectra and NMR. The redox ...
