Physico-chemical studies on the coordination compounds of polystyrene-anchored azetidinone

The reaction between polystyrene 3-formylsalicylate and benzoylhydrazide in DMF in the presence of ethyl acetate results in the formation of polystyrene N-(2-carbamoylphenyl)-2'-hydroxybenzylideneimine-3'-carboxylate (I). A dioxane suspension of I reacts with chloroacetyl chloride in the presence of triethylamine to form polystyrene N-(2-carbamoylphenyl)-4-(2'-hydroxy-3'carboxybenzylidene) azetidin-2-one, PSCH2-LH2 (II). A DMF suspension of II reacts with Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Fe(III), Zr(IV), MoO2 (VI) and UO2 (VI) ions and forms: [PSCH2 LHM(OAc)(DMF)] [here M = Co(II), Cu(II), Zn(II), Cd(II), UO2 (VI)], [PSCH2-LHM(OAc)(DMF)(3)] [here M = Mn(II), Ni(II)], [PSCH2-LHFeCl2 (DMF)(2)], [PSCH2-LHZr(OH)(3) (DMF)(2)] and [PSCH2-LHMoO2 (acac)]. The polystyrene-anchored coordination compounds have been characterized on the basis of elemental analyses, spectral (IR, reflectance and ESR) studies and magnetic susceptibility measurements. The IR studies are indicative of the monobasic bidentate (OO donor) nature of II. The acetato ligands are bonded to the central metal ions in a monodentate fashion in these coordination compounds. A squareplanar structure to the compounds of Co(II) and Cu(II) ions, a tetrahedral structure to the compounds of Zn(II) and Cd(II) ions, an octahedral structure to the compounds of Mn(II), Ni(II), Fe(III), MoO2 (VI) and UO2 (VI) ions and a pentagonal bipyramidal structure to the compounds of Zr(IV) ions are suggested. The compounds of Mn(II), Co(II), Ni(II), Cu(II) and Fe(III) are paramagnetic and magnetically dilute, while those of others are diamagnetic.