2-propylimidazole chemical structure and properties 2-propylimidazole (2-propylimidazole), referred to as 2-pi, is an organic compound with a chemical formula c6h10n2. its molecular structure consists of an imidazole ring and a propyl side chain. the imidazole ring is a five-membered heterocycle containing two nitrogen atoms, one of which is connected to a propyl group (—ch2ch2ch3). this...