THE CRYSTAL AND MOLECULAR-STRUCTURE OF [2,2'-N,N'-O-BIPYRIDYLKETONEHYDRATE, N,N-BIPYRIDYLKETONE OXIME, NITRO COBALT(III) DIHYDRATE]

The crystal structure of (2,2'-N,N'-O-dipyridylketonehydrate) (2'-N,N' -dipyridylketone oxime) nitro cobalt(III) dihydrate was determined by X-ray methods. Crystal data are: monoclinic space group C2/c, Z = 8, a = 13.026(5), b = 12.150(5), c = 28.60(1) Angstrom, beta = 103.37(3)de grees. The ketone hydrate is coordinated through the two pyridyl nitro gen atoms, N4 and N5, and an oxygen atom of the ketone hydrate, O2, as a tridentate ligand. The oxime molecule is coordinated through one of the pyridyl nitrogen atoms, N1, and the oxime nitrogen atom, N3, as a bidentate ligand. A nitrite ion occupies the sixth coordination site of the distorted octahedron. The cobalt coordination distances range f rom 1.896(9) to 1.994(9) Angstrom. The oxime ligand is nearly perpendi cular to the equatorial plane of the octahedron and the coordinated ox ygen atom of the dipyridyl ketone ligand is 9.27 degrees from the norm al to the equatorial plane of the coordination octahedron.