Synthesis, crystal structure and properties of binuclear manganese complex [(bipy)2Mn2(μ-O)(μ-Ac)2(H2O)2](ClO4)2

Binuclear manganese complex [(bipy)(2)Mn-2(mu-O) (mu-Ac)(2)(H2O)(2)](ClO4)(2) was synthesized by the reaction of MnAcs . 2H(2)O with 2,2'-bipyridine in the HAc-NaAc buffer (pH = 4.0). X-ray diffraction result for the single crystal shows that the crystal is monoclinic, space group C-2/C, with a = 3.408 2(7), b = 0.864 4(2), c = 2.174 9(4) nm, beta = 105.2 degrees, V = 6.186(2) nm(3), Z = 8. There are two very strong peaks of UV-Vis spectrum in the range of 400-600 nm, which are similar to those of Mn catalase and Mn ribonuleotide reductase extracted from organisms. Cyclic voltammogram shows that the complex in CH3CN undergoes quasi-reversible one-electron reduction and oxidation at E-1/2 = 1.15 V.