Synthesis, X-ray structural properties of hexacoordinate nickel(II)complex incorporating 4-methylpyrazole and azide ligands

Mixed ligand complexes plays an important role in numerous chemical and biological systems. Nickel(II) complexes of mixed ligands accompanied by heterocyclic nitrogendonors as pyrazole base ligands and thiocyanate, azide, halides etc. have been used extensively in organometallic and inorganic chemistry [1-3]. In this research work a novel mixed-ligand nickel(II) complex, trans-[NiII (N3)2 (Pzme)4], (N3 = azide and Pzme = 4-methylpyrazole) has been synthesized and characterized by X-ray crystallography. The X-ray diffraction reveals that the nickel(II) ion in the title complex is in a distorted octahedral arrangement of two trans N-donor atoms of azide ligands and four another N-donor atoms of pyrazole derived ligands. The complex crystallizes in the monoclinic crystal system, space group C2/C with a= 12.901 (2)Å, b= 10.5003 (8)Å, c= 14.118 (1) Å, α= 90.00º, β= 116.398 (2)º, γ= 90.00º lattice specification.