Synthesis and characterization of a chelating resin containing ONO donor tridentate Schiff base and its coordination compounds with copper(II), nickel(II), cobalt(II), iron(III), zinc(II), cadmium(II), manganese(II), molybdenum(VI), zirconium(IV) and uranium(VI)

Abstract

New polystyrene supported coordination compounds have been synthesized by the reaction of metal salt/metal coordination compound with the polystyrene supported Schiff base (PS-LH₂) (obtained by the reaction of chloromethylated

polystyrene, 3-formylsalicylic acid and ethanolamine). The compounds have the formulae: PS-LCu·DMF, PS-LNi ·3DMF, PS- LCo·3DMF, PS-LFeCl·2DMF, PS- LZn·DMF, PS-LCd·DMF, PS-LMn·3DMF, PS- LMoO₂·DMF, PSL-Zr(

<span style="font-size:14.0pt;line-height:115%;font-family:" times="" new="" roman";="" mso-fareast-font-family:"times="" roman";color:black;mso-ansi-language:en-in;="" mso-fareast-language:en-in;mso-bidi-language:hi"="" lang="EN-IN">OH₂·2DMF and PS-LUO₂·DMF (DMF = dimethylformamide). The compounds have been characterized by elemental analyses, IR, electronic, ESR spectral and magnetic susceptibility measurements. The Cu(II ), Ni (II ), Co(II), Fe(III) and Mn(II) compounds are paramagnetic while the Zn(II ), Cd(II ), Zr(IV), Mo(VI) and U(VI) compounds are diamagnetic. The magnetic and ESR data indicate the magnetically dilute nature of the metal centres. The shifts of the v(C=N) (azomethine), v(C- O)(phenolic) and v(C- O)(alcoholic) stretches have been monitored to find out the donor sites of PS-LH₂ . A square planar structure for PS- LCu·DMF; a tetrahedral structure for PS-LZn·DMF and PS- LCd·DMF; an octahedral structure for PS- LNi·3DMF, PS- LCo·3DMF, PS- LFeCl·2DMF, PS- LMn·3DMF, PS- LMoO₂·DMF and PS- LUO₂^. DMF have been suggested for the compounds. PS- LZr(OH)₂·2DMF is pentagonal bipyramidal.</span>