Qiaofeng Han

Structure and characterization of bis(N-p-chloro-phenyl-salicylideneaminate) Schiff base copper(II) complex: Cu[N-p-Cl-Ph-Sal]2

The crystal and molecular structure of the title compound has been determined by X-ray crystallography. It crystallizes in the monoclinic system, space group P21/c, with lattice parameters a = 13.678(3), b = 10.729(2), c = 8.1996(2) Å, β = 98.96°, V = 1188.7(4) Å3, and Z = 4. The crystal structure contains two centrosymmetric molecules of bis (N-p-chloro-phenyl-salicylideneaminate) Schiff base copper(II). Copper(II) ion is coordinated in a slightly distorted trans square-planar configuration, the distortion consisting of a reduction of the N–Cu–O angle with the chelate rings from the ideal value of 90°. The p-chlorophenyl rings with salicylidene moieties form a dihedral angle of 38.96°.

Structure, Magnetic and Spectral Properties of Ethyl Phosphite Nitrate Tri(1,10-phenanthroline) Nickel(II) Solvate Trihydrate: [Ni(phen)3]NO3·C2H5OP(O)O·3H2O

The compound, [Ni(phen)3]NO3 · C2H5OP(O)O · 3H2O, was obtained by the reaction of Ni(NO3)2, C2H5OP(OH)2 and 1,10-phenanthroline in 95% EtOH solution, and was characterized using IR and UV spectra and magnetic susceptibility measurements over the temperature range 75-300 K. The red crystal is triclinic of space group P&1macr;, with lattice parameters a = 12.462(3), b = 13.416(3), c = 13.422(3) Å, f = 75.88(3), g = 64.75(3), n = 65.87(3)°, and Z = 2. The coordinated cation contains a six-coordinate nickel atom chelated by three phenanthroline ligands, resulting in a distorted octahedral arrangement with the six Ni-N distances ranging from 2.086(2) to 2.113(3) Å. In addition to the nickel coordination complex, there are two anions, NO3 and C2H5OP(O)O-, and three water molecules which complete the crystal structure. In the solid state, the title compound forms a three dimensional network structure through hydrogen bonds. The intermolecular hydrogen bonds connect the [Ni(phen)3]2+, NO3, C2H5OP(O)O- and H2O molecules.