Synthesis, crystal structure and properties of binuclear manganese complex[(bipy)(2)Mn-2(mu-O)(mu-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 i n the HAc-NaAc buffer (pH = 4.0). X-ray diffraction result for the single c rystal 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 = 6.18 6(2) nm(3), Z = 8. There are two very strong peaks of UV-Vis spectrum in th e range of 400-600 nm, which are similar to those of Mn catalase and Mn rib onuleotide reductase extracted from organisms. Cyclic voltammogram shows th at the complex in CH3CN undergoes quasi-reversible one-electron reduction a nd oxidation at E-1/2 = 1.15 V.