Synthesis crystal structure and properties of mixed-valent binuclear manganese complex [(bipy)2Mn(μ-O)2 Mn(bipy)2](ClO4)3

Binuclear mixed-valent manganese complex [(bipy)(2)Mn(mu-O)(2)Mn(bipy)(2)] (ClO4)(3) was synthesied by the reaction of [Mn3O(O2CCH2Cl)(6)(C5H5N)(2)(H2O)]. CH2ClCOO . H2O with bipy and NaClO4 in the HAc-NaAc buffer (pH = 4.0). X-Ray diffraction result for the single crystal shows that the crystal is monoclinic, space group P2(1)/c with a = 1.3854(3), b = 1.3943(3), c = 2.4225 (5) nm, beta = 103.30 degrees, V = 4.554(2) nm(3), Z = 4. A peak of 640 nm in UV-Vis spectrum is designed to electronic transition of bridge-legand O2- to Mn (III). Cyclic voltammogram shows the complex in CH3CN underwent reversible one-electron reduction and oxidation at E-1/2 = 1.25V.