Bipyridylium quaternary salts and related compounds. Part II. The preparation of the 1,1′-diamino-4,4′-bipyridylium dication and its behaviour in alkaline solution
Abstract
The preparation of the 1,1′-diamino-4,4′-bipyridylium dication is described. In alkaline solution, this gives a product believed to be a nitrogen betaine derived by loss of a proton.