SYNTHESIS AND CHARACTERIZATION OF COPPER(II) AND ZINC(II) COMPLEXES OF N-ACETYL-DIPEPTIDES AND COPPER(II)-DIPEPTIDE COMPLEXES .5.

A few complexes of the type ML(2)xH(2).O [M = Cu(II) or Zn(II), LH = N -acetyl-dl-valylglycine or N-acetyl-1-phenylalanylglycine, x = 0-2] an d adducts of the type CuL(2)B(n).xH(2)O (n = 2, B = pyridine, 2-, 3- a nd 4-picoline, triphenylphosphine oxide, n = 1 for 2,2'-bipyridyl and 1,10-phenanthroline, x = 0-2.5) have been prepared and characterized b y TGA, molar conductance, magnetic susceptibility measurements, electr onic (solid and solution), infrared, ESR and C-13 NMR spectra wherever applicable. The ESR spectra of four copper(II) complexes indicate the presence of both monomeric and dimeric species. The remaining copper( II) complexes are magnetically dilute species.