SYNTHESIS AND CHARACTERIZATION OF DIAQUA(3-p-TOLYLIMINO-2-BUTANONE OXIMATO)(3-p-TOLYLIMINO-2-BUTANONE OXIME)NICKEL(II) PERCHLORATE

摘要

(Ni(L~(-1))(HL)(H_2O)_2) centre dot ClO_4 with a Schiff base ligand L (HL =3-p-tolylimino-2-butanone oxime) was prepared and structurally characterized by IR, cyclic voltammetry and X-ray diffraction methods. The nickel atom has distorted octahedral coordination consisting of four nitrogen atoms and two oxygen atoms. The equatorial plane is formed by two oxime nitrogen atoms and two imine nitrogen atoms of two Schiff base ligand (L~(-1) and HL) with Ni-N bond distances between 2.01(1) and 2.11(1) A. Water oxygen atoms occupy axial positions with Ni-O bond distances of 2.06(1) and 2.15(1) A. The oxime groups in the Schiff base ligands are coordinated to Ni atom through their nitrogen atoms. One asymmetric intramolecular hydrogen bridge between the two oxime groups is found in the title complex.