Synthesis,Crystal and Molecular Structures of the Octanuclear Cationic Mixed-Valence Cobalt Acetate Complex

摘要

A new octanuclear mixed-valence cobalt acetate complex of the cationic type [Co4~(II) Co_4~(III) (mu_4-O)4(mu3-OMe)4(mu-OAc)6(H2O)8]F2 centre dot 10H2O ([I]F2 centre dot 10H2O) was prepared by crystallization from a solution of 'cobalt(III) acetate' in a Me2CO-MeOH-H2O-HF mixture and studied by X-ray diffraction.The crystals are monoclinic:space group C2/c,a = 17.222 A,b = 16.836 A,c= 16.586 A,beta = 94.902°,Z = 4,R = 4.37% (I > 2 sigma(I)).In the crystal,the I~(2+) complex cations,fluoride anions,and solvate water molecules form a three-dimensional (3D) coordination supermolecular system.