Zinc and cadmium complexes of pyridyl-benzotriazole: Syntheses, structures and supramolecular interaction

Five novel complexes with two pyridine substituted benzotriazole ligands, 1-(2-pyridyl)benzotriazole (L1) and 1-(4-pyridyl)benzotriazole (L2), [Zn(L1)2Cl2] (1), [{Zn(L1)2Cl2}·(L1)2] (2), [Zn(L2)2Cl2] (3), [{Zn(L2)(H2O)3(μ2-SO4)}·H2O] (4), and [{Cd(L2)(H2O)3(μ2-SO4)}·H2O] (5) were synthesized. The details of the structures were characterized by X-ray single crystal analysis, revealing that these complexes were assembled together via supramolecular interaction, such as, hydrogen bonding and π–π interactions. The influence of organic ligands, anions and reaction conditions in the formation of the complexes were investigated.