Polymer complexes. XLIII. EPR, spectra, and stereochemical versatility of novel copper(II) polymer complexes

Copper(II) polymer complexes of empirical formula [Cu( ligand)(2)X-2] ( where X=Cl, Br, I, NO3, and 1/2 SO4) and [Cu( ligand)(CH3COO)(2)] have been prepared with poly(3-phenylacrylidine semicarbazone). All the polymer complexes prepared have been characterized by elemental analysis, magnetic moment, conductance, IR, electronic, H-1-NMR, and electronic paramagnetic resonance spectral studies. The polymer complexes [Cu( ligand)(2)X-2] and [Cu( ligand) (CH3COO)(2)] may have tetragonal symmetry while the [Cu( ligand)(2)( 1/2 SO4)(2)] may be five-coordinate trigonal bipyramidal in structure. All complexes exhibit normal magnetic moments corresponding to one unpaired electron except [Cu( ligand)(CH3COO)(2)] which shows a subnormal magnetic moment. EPR spectra of the polymer complexes have been studied with a view to assigning their stereochemistries. Various EPR parameters have been calculated. The g, A, G values for all the polymer complexes are consistent with a tetragonal 1 - 5 and trigonal bipyramidal 6 stereochemistry in the Cu(II) polymer complexes of homopolymer.