Synthesis and Characterization of Polystyrene-Anchored Tridentate Schiff Base and its Complexes With Dl-, Tri-, Tetra- and Hexavalent Metal Ions

D. Kumar*, A. Syamal* and L. K. Sharma

Department of Chemistry, National Institute of Technology, Kurukshetra-136119 (lndia)

The reaction of chloromethylated polystyrene(PS-Cl) with Schiff base(LH2) derived from 3-formylsalicylic acid and nicotinic acid hydrazide in DMF in presence of triethylamine and ethyl acetate, results in the formation of polystyrene anchored dibasic tridentate Schiff base(PS-LH2). The latter reacts with copper(II), zinc(II), cadmium(ll), dioxomolybdenum(VI), dioxouranium(VI), manganese(II), cobalt(II), nickel(II), iron(III) and zirconium(IV) ions to form magnetically dilute complexes, PS-LM.DMF [where M = copper(II), zinc(II), cadmium(II), dioxomolybdenum(VI), dioxouranium(VI)], PS-LM'.3DMF [where M' = nickel(II), cobalt(II), manganese(II)], PS-LFeCl.2DMF and PS-LZr(OH)2.2DMF. The polystyrene-anchored coordination compounds have been characterized on the basis of elemental analysis, infrared spectral studies and magnetic susceptibility measurements. PS-LH2 behaves as dibasic tridentate ligand in the polystyrene-anchored coordination compounds. The ESR spectrum of PS-LCu.DMF indicates the tetragonal type symmetry about the copper(ll) ion. A tetrahedral structure for zinc(II), cadmium(ll) complexes; a square planar structure for copper(ll) complex; an octahedral structure for nickel(II), cobalt(II), manganese(II), iron(III), dioxomolybdenum(VI), dioxouranium(VI) complexes and a pentagonal bipyramidal structure for zirconium(IV) complex have been suggested.

Polystyrene-anchored Schiff bases; Coordination compounds; Coupling reaction; Acid hydrazone