Abstract
A mononuclear cobalt(II) complex, [ $$\hbox {Co}\hbox {(phen)}_{2}\hbox {Cl}_{2}$$ ], (phen = 1,10-phenanthroline) has been synthesized and structurally characterized by different spectroscopic methods including single crystal X-ray structural study. X-ray crystal structural analysis revealed that the cobalt(II) complex crystallizes in a monoclinic system with C2 / c space group and exists in cis-configuration in its crystalline state. Room temperature magnetic measurement accounts for 3e paramagnetism and indicates high spin cobalt(II) in the solid state. The cobalt(II) complex has been evaluated as a functional model for phosphatase enzyme by using 4-nitrophenylphosphate (PNPP) as a standard substrate in aqueous DMF medium. This mononuclear cobalt(II) complex exhibits good hydrolytic phosphoester cleavage efficiency with $$k_{\mathrm{cat}}$$ value of $$3.78\times 10^{2}\hbox {h}^{-1}$$ . SYNOPSIS The cobalt(II) complex of phenanthroline exhibits good catalytic activity towards 4-nitrophenylphosphate (PNPP) as a standard substrate in aqueous DMF medium with $$k_{\mathrm{cat}}$$ value of $$3.78\times 10^{2} \hbox { h}^{-1}$$ . .
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