Synthesis and Structural Characterization of {[Mn(phen)_2(OAc)(H_2O)]ClO_4}_2H_2O

1 INTRODUCTION Chemistry of manganese cluster has become an attractive research field because of the involvement of manganese in several biological redox-active sys- tems1,2], especially in the oxygen-evolving complex (OEC) of photosystem Ⅱ (PSⅡ) in green plants3]. It was thought that the coordination environment of Mn in OEC contains O and N donors, and the bind- ing of aqua to the Mn site may be important to the oxidation of aqua for the evolution of dioxygen4, 5]. In recent …

Synthesis and Structural Characterization of {[Mn(phen)2(Oac)(H2O)]ClO4}2·H2O

The crystal structure of the title compound {Mn(phen)2(OAc)(H2O)]C1O4}2@H2O(phen = 1,10-phenanthroline) has been synthesized and determined by X-ray diffraction. The crystal is of triclinic, space group P1- with a = 12.7955(4), b = 15.0544(4), c = 16.2183(4) A, a =64.479(1), β =67.526(1), γ= 83.582( l )°, C52H40Cl2Mn2N8O15, Mr = 1197.70, V = 2600.1 ( l ) A3, Dc = 1.530 g/cm3, F(000) = 1224, μ = 0.666 cm- 1 and Z = 2. The final refinement gave R = 0.0691 and wR = 0.1821 for 6131 observed reflections with Ⅰ＞ 2σ(Ⅰ). The cell of the complex contains two uniform mono-manganese molecules Mn(phen)2(OAc)(H2O)]C1O4 and a solvate water molecule.Four nitrogen atoms from two chelating phenanthroline ligands and one oxygen atom from acetate ligate to the MnⅡ ion, forming a distorted octahedral geometry together with one coordinated water molecule. One ClO4- anion and one water molecule exist outside the cation Mn(phen)2(OAc)-(H2O)]+ as a counter ion and solvate molecule, respectively.