Synthesis, Spectroscopic Studies and Crystal Structure of a New Co (III) Complex Derived from ONO Donor Tridentate Schiff Base Ligand

A new Co (III) complex prepared by the reaction of 2-((2 hydroxyethylimino)methyl)phenol (H2L) with Co(III) ion is reported in this paper. The H2L ligand is structurally characterized by elemental analysis, NMR and infrared spectroscopies. The mononuclear complex [Co(HL)2]·Cl·H2O, is characterized by infrared spectroscopy, elemental analysis, conductance and magnetic room temperature measurements and single crystal X-ray diffraction. The compound crystallizes in the monoclinic system in the space group P21/c with the unit cell parameters a = 16.4258 (6) Å, b = 10.1398 (4) Å, c = 11.7705(4) Å, β = 94.885(3)°, Z = 4, R1 = 0.0374 and wR2 = 0.075. The asymmetric unit of the compound contains a discrete [Co(HL)2]+ cation, one free chloride anion and one uncoordinated water molecule. The coordination polyhedron around the Co (III) center is best described as a distorted octahedral with CoN2O4 chromophore. The crystal structure of the complex is stabilized by intramolecular and intermolecular hydrogen bonds.