Synthesis and Characterization of Mixed Copper Complexes with Saccharinate and Aminoacids

E SANTI; ENRIQUE JOSE BARAN; MOMBRU, A; TORRE, MH

Angra dos Reis/Brasil

Congreso; XV.Brazilian Meeting on Inorganic Chemistry and II.Latin American Meeting on Biological Inorganic Chemistry; 2010

Sociedade Brasileira de Quimica

 In this work the synthesis and characterization of new mixed Cu(II) complexes containing saccharinate and different amino acids as ligands, are reported. The obtained complexes had the general stoichiometry           [Cu(sac)2(aa)].xH2O whith aa = glycine, aspartic acid, serine, and glutamic acid. The IR and Ramn spectra of the complexes were compared with those of the precursor [Cu(sac)2(H2O)4], the free ligands and similar Cu(II) complexes of each of the amino acids. Coordination occurs through the deprotonated heterocyclic N atom of saccharin, and the amino acids act as bidentate through the amino and carboxylato groups, generating a pseudo-octahedral geometry around the metal center. Powder X-ray diffraction studies of the complexes show that they present different structural characteristics. Their unit cell parameters were determined and are briefly discussed.