A benzoate bridged dinuclear mixed valence cobalt(III/II) complex with CoIIIO4CoII core: Synthesis, structure and investigation of its phenoxazinone synthase mimicking activity

A novel dinuclear benzoate bridged mixed valence cobalt(III/II) complex with compartmental reduced Schiff base ligand has been synthesized and characterized. The prepared complex has ability to show phenoxazinone synthase mimicking activity, which has been monitored spectrophotometrically. [Display omitted] A dinuclear class-I mixed valence cobalt(III)/cobalt(II) complex, [(N3)CoIIIL(µ-C6H5COO)CoII(N3)]·CH3OH [where H2L = (1,3-propanediyl)bis(iminomethylene)bis(6-methoxyphenol)] has been prepared and characterized by elemental and spectral analysis. The structure of the complex has been confirmed by single crystal X-ray diffraction analysis. The cobalt(III) center is placed in the inner N2O2 compartment, whereas cobalt(II) center is present in the outer O4 compartment of the ligand. The complex may act as active functional model for the oxidation of 2-aminophenol to 2-aminophenoxazine-3-one with kcat = 153.90 h−1.