Mixed-Ligand Coordination Compounds of Copper with Pyrocatechol Derivatives and 2-Hetarylbenzimidazoles

Four new mixed-ligand copper-containing coordination compounds were synthesized, with the organic ligands, one of which (O,O-ligand) is bis-tert-butyl-substituted pyrocatechol, and the second (N,N-ligand) is 2-pyridylbenzimidazole or 2-imidazolylbenzothiazole. The structure of the obtained complexes was established based on the data of elemental analysis, electron spectroscopy, and electrochemical studies using cyclic voltammetry and rotating disk electrode voltammetry. It was shown that the resulting complexes with 2-pyridylbenzimidazole ligand contain Cu2+, and complexes with 2-imidazolylbenzothiazole contain Cu+.