THE CRYSTAL-STRUCTURE OF TRIS(N,N-DIETHYL-N'-BENZOYLSELENOUREATO)COBALT(III)

Co(C12H15N2OSe)3 crystallizes in the trigonal space group P3BAR. The cell parameters are a = 16.697(4), c = 8.557(8) angstrom, Z = 2. The structure was solved with Patterson and direct methods and was refined to a final R-value of 4.59%. Co(III) is bidentally coordinated to three N,N-diethyl-N'-benzoylselenourea molecules to form a distorted octahedron with facial arrangement of the selenium and oxygen donor atoms. The Co-Se and Co-O bond lengths are 2.328(2) and 1.943(6) angstrom, respectively. The arrangement of the molecules within the unit cell leads to the formation of hexagonal channels parallel to the crystallographic c-axis. The wall of the channels is formed by carbon atoms of the phenyl group. The diameter of the channels is 8.148 angstrom.