Effect of Macrocycles on the Photochemical and Electrochemical Properties of Cobalt-Dehydrocorrin Complex: Formation and Investigation of Co(I) Species
Abstract:Co(II)-pyrocobester (P -Co(II) ), a dehydrocorrin complex, was semisynthesized from vitamin B 12 (cyanocobalamin), and its photochemical and electrochemical properties were investigated and compared to those of the cobester (C -Co(II) ), the cobalt-corrin complex. The UV−vis absorptions of P -Co(II) in CH 2 Cl 2 , ascribed to the π−π* transition, were red-shifted compared to those of C -Co(II) due to the πexpansion of the macrocycle in the pyrocobester. The reversible redox couple of P -Co(II) was observed at … Show more
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