A series of mononuclear, four and six-coordinated polymeric chelates of the type ML2nwhere M=Cu(II), Ni(II), Co(II), Mn(II) or Zn(II) and L= poly3,5-(1#x2013;aceto-2,4-dihydroxy phenylene)butylene have been synthesized. The polychelates were characterized on the basis of IR spectroscopy and elemental analyses. The stereochemistry is square planar around Cu(II), tetrahedral around Zn(II) and octahedral around Ni(II), Mn(II) and Co(II). The geometry around the central metal ion in each chelate is proposed on the basis of measurements of magnetic susceptibilities and UV-reflectance spectra. Ligand field splitting parametrs 10Dq, interelectronic repulsion parameters B, nephelauxetic parameters #x3B2; and L.F.S.E.'s have been calculated for octahedral chelates of Ni (II) and Co(II). All chelates are resistant to moderately concentrated acids and dilute alkais at ambient temperature. They exhibit thermal stabilities to varying degrees. IR spectra show that the ligand usually coordinates via the cwbonyl oxygen (C=O) and t h e phenolic OH with replacement of hydr.ogen by metal ions.
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