Structure and characterization of O,O-diethylthiophosphorylhydrazine o-vanillin Schiff base nickel(II) complex: NiC24H36N4O8P2S2

The crystal and molecular structure of the complex of Ni[(C2H5O)(2)PSNHNTCP h(o-O)OMe](2) has been determined by X-ray crystallography. The compound cr ystallizes in the monoclinic system, space group P2(1)/n, with lattice para meters a = 14.805(3), b = 7.9550(16), c = 15.176(3) Angstrom, beta = 117.94 (3), and Z = 2. The unit cell contains two centrosymmetric molecules of O,O -diethylthiophosphorylhydrazine o-vanillin Schiff base nickel(II). The nick el(II) ion is coordinated in a slightly distorted trans square-planar confi guration, the distortion consisting of a reduction of the N-Ni-O angle with the chelate rings from the ideal value of 90 degrees to 87.69 degrees. The coordination geometry of nickel(II) is square planar with two equivalent N i-N and Ni-O bonds. The two phenyl rings and the phosphorylhydrazine moieti es are in one plane forming an extensive delocalized system. Within each mo lecule, the two ligands are linked by a pair of N-H . . .O hydrogen bonding interactions. In the solid state, the title compound form a hydrogen bondi ng network through C-H . . .O intermolecular hydrogen bonding.