2-propylimidazole chemical characteristics and structure 2-propylimidazole (2pi) is an organic compound and belongs to an imidazole derivative. its molecular formula is c7h10n2 and its molecular weight is 122.16 g/mol. the structure of 2-propylimidazole is characterized by a propyl side chain attached to its imidazole ring, which imparts its unique physical and chemical properties. from a...