Synthesis and crystal structure of a new mononuclear cobalt(III) complex with 2,2′-dipyridylaniine and glycine as ligands

A new mononuclear cobalt(III) complex [Co(dpa)(2)(Gly)](ClO4)(2)center dot 4H(2)O was synthesized by the reaction of Co2+, glycine (gly) and 2,2'-dipyridylamine (dpa) in a methanol-water solution, and its structure was characterized by IR, EA, ES-MS and X-ray structure analysis. The compound crystallizes in the monoclinic system, space, group P2(1)/n with a = 12.8195(2), b = 13.2904(2), c = 19.1104(2) angstrom, beta = 109.378(1)degrees, V = 3085.89(8) angstrom(3), Z = 4, M-r = 746.36, D-c = 1.606 g/cm(3), mu = 0.808 mm(-1), F(000) = 1536, the final R = 0.0543 and wR = 0.1306 for 5393 independent reflections. The magnetic measurement of the compound at room temperature shows that it is diamagnetic and the cobalt ion is in low spin +3 oxidation state. ES-MS experiments show that the [Co(dpa)(2)(Gly)](2+) cation is very stable in the methanol solution.