PHYSICOCHEMICAL PROPERTIES AND COORDINATION TENDENCIES OF SOME NEW POLYMERIC LIGANDS

Poly [1,3 (2-ethoxy-4-hydroxy-5-propylphenylene) butylene] was prepare d by Friedel-Craft polycondensation of 2-hydroxy-4-ethoxypropiophenone and 1,4-butane diol in presence of polyphosphoric acid catalyst. The polymer sample was characterized by IR spectra, elemental analysis and its number-average molecular weight (MnBAR) determined by nonaqueous titration. With the aim at providing some answers to questions regardi ng the co-ordination tendencies of polymeric ligand, we have investiga ted some transition metal derivatives. All the compounds are of the ty pe [ML2]n where M = Cu2+, Ni2+, Co2+, Mn2+ and Zn2+ L = 2-hydroxy-4-et hoxypropiophenone-1,4-butane diol resin. Structures of the polymeric c helates are deduced from IR and electronic spectra, magnetic propertie s and elemental analysis. The combined evidences provide information r egarding co-ordination mode of resin involving the donor oxygen of car bonyl group and consequently indicating square planar co-ordination ar ound Cu2+, tetrahedral co-ordination around Zn2+ and octahedral co-ord ination around Mn2+, Co2+ and Ni2+. Analytical data also support 1:2 m etal: legand stoichiometry.