Synthesis and Extended 3D Hydrogen-bonded Structure of Complex Tris(violurato-N,O) Cobalt(III) Hexahydrate

1 INTRODUCTION The study of cobalt complexes plays an important role in pharmacology, coordination chemistry and bio- inorganic chemistry. The recent work on organoco- baloximes shows that it has outgrown its initial rele- vance of Vitamin B12 model and acquired an indepen- dent research field because of its rich chemistry1~4]. At the same time, research on the complexes with oxime ligands has considerable interest owning to their special catalytic, electric, magnetic properties and bio…

Synthesis and Extended 3D Hydrogen-bonded Structure of Complex Tris(violurato-N,O) Cobalt(III) Hexahydrate

The cobalt(III) violurato complex (Co(C4H2N3O4)3]·6H2O, Mr = 635.28) has been prepared and structurally characterized. The crystal is of monoclinic, space group P21/n with a = 10.176(1), b = 11.8010(9), c = 19.706(2)(A), β= 97.382(3)°, V = 2346.9(4) (A)3, Z = 4, Dc = 1.798 g/cm3, F(000) = 1296, μ= 0.839 mm-1, R = 0.0482 and wR = 0.1357. The Co atom in the title compound is six- coordinated by three carbonyl O atoms and three oximido N atoms of three violurato ligands, forming an octahedral coordination geometry. The neighboring molecules are connected together by hydrogen bonds of N-H…O, O-H…O and O-H…N, forming an extended three-dimensional supra- molecular architecture.