Complexing properties of some pyrimidines

The synthesis of transition metal barbiturate, and thiobarbiturate complexes containing different functional groups of variable electronic character with Co-II, Ni-II, Cu-II, Pd-II, and Pt-II have been prepared. The stereochemistry and the mode of bonding of the complexes were determined by elemental analysis and electronic and vibrational spectra together with their magnetic moment values. Electronic spin resonance of copper complexes were recorded. The Racah parameter of some cobalt and nickel complexes were calculated. Some of the complexes are of mixed stereochemistry. All the Pd-II or Pt-II complexes are of square planar geometries.