Synthesis and crystal structure of tetra-[mu-O-(dimethylglyoximato-N,N ')dicopper(II) [Cu-2(Hdmg)(4)] and dinickel(II) [Ni-2(Hdmg)(4)]

• Key Words:copper(II) complexes; nickel(II) complexes; dimethylglyoxime anion; X-ray
• Abstract:Two new complexes of tetra-[mu-O-(dimethylglyoximato-N,N') dicopper(II)] and dinickel(11), CU2(HdMg)(4) (A) and Ni-2(Hdmg)(4) (B), (Hdmg(-) = dimethylglyoxime anion) have been synthesized and their structures determined by X-ray crystallography. Both of the complexes crystallize in the monoclinic system, space group P2(1)/c, with lattice parameters a = 7.1593(1), b = 17.142(1), c = 9.809(2) angstrom, beta = 107.00(1)degrees, and Z = 4 for A and a = 7.1061(1), b = 17.0437(1), c = 9.7514(2) angstrom, beta = 108.291(1)degrees and Z = 4 for B. The final R = 0.0351 (0.0487) and wR = 0.0873 (0.1214) based on 1103 (2286) reflections with I > 2 sigma(1) for A(B). The results indicate that copper(II) and nickel(II) atoms are connected by two mu(2)-O- bridges formed by two hydroxy oxygen atoms in the two oxime groups, respectively; each five-coordinated metal atom possesses a square pyramidal geometry.
• Volume:18
• Issue:3
• Translation or Not:no