Crystal structures and polyphenol oxidase activities of dinuclear copper(II) and cobalt(II) complexes with N,N,N′,N′-tetrakis (2′-benzimidazolylmethyl)-1,4-diethylene amino glycol ether (EGTB)

Dinuclear copper and cobalt complexes as model compounds for polyphenol oxidase have been synthesized and characterized. Their activities toward pyrogallol and catechol have been studied, and the kinetics obey the Michaelis-Menten equation.