Synthesis and Characterization of Palladium (IV) Complexes with Guanine, Adenine, and Uracil Base

New Pd(IV) complexes have been prepared through the reactions of (en = ethylenediamine) with Guanine, Adenine, or Uracil anion as purine and pyrimidine base. We identified the ratio of central metal versus ligands by elemental analysis and proposed the coordinating site of the base by infrared spectrum, -NMR spectrum. Guanine or Adenine ligand coordinated at N7 site and an en ligand exchanged for counter ions of the starting material . As these results, the complexes showed the formula (L = Guanine, Adenine). But in the Uracil complex no exchange of the en ligand and occured and Uracil anion preferred the N1 to N3 as coordinating site, the complex