Crystal structure and spectroscopic properties of a new syn-anti carboxylate-bridged polymeric chain copper(II)-glycylglycine complex

A new polymer complex of copper(II)-glycylglycine {[Cu(glygly)(H2O)][Cu(glygly)(H2O)(2)]}(n) (.) 5nH(2)O (1) is reported. It crystallizes in the P2(1)/c space group, with a = 14.669(2), b = 9.8480(10), c = 14.053(2) Angstrom, beta = 102.730(10)degrees and Z = 4. Compound 1 consists of [Cu(glygly)(H2O)](n) 1D carboxylate-bridged polymeric chains, monomer Cu(glygly)(H2O)(2) molecules which form hydrogen-bonded chains and uncoordinated water molecules. In all cases, the geometry around copper(II) is a slightly distorted square pyramid with the water oxygen at the apex of the pyramid. The ESR, UV-Vis and IR spectroscopy of the compound were also studied.