Raman spectral studies of the complexes of biuret with metal(II) halides

As the biuret can adopt either the cis- or the trans-configuration in its complexes, the Raman spectra have been measured for the complexes of biuret with metal(II) halides and the modes of coordination, of ligand in all these complexes,have been established. The complexes N(biuret)(2)X-2 (M = Mn & Co; X = Cl or Br and M = Ni and Zn; X = Cl) have been found to contain biuret in the cis-configuration, coordinating with metal ions through both of its carbonyl oxygen atoms. On the other hand, complexes M(biuret)(2)Cl-2 (M = Ca, Cd and Hg) and Cd(biuret)(2)Br-2 contain biuret in the trans-configuration, coordinating through one of the two carbonyl oxygen atoms. These results are consistent with the previously reported I.R and E.S.R. spectral studies [1,2].

MARGARET GOODGAME ,IZHAR HUSSAIN ,