ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 36, Number 5
JKCSEZ 36(5)
October 20, 1992 

New Pd(Ⅳ) complexes have been prepared through the reactions of trans-[Pd(en)2Cl2](ClO4)2 (en = ethylenediamine) with Guanine, Adenine, or Uracil anion as purine and pyrimidine base. We identified the ratio of central metal versus ligands by C·H·N elemental analysis and proposed the coordinating site of the base by infrared spectrum, 1H-NMR, and 13C-NMR spectrum. Guanine or Adenine ligand coordinated at N7 site and an en ligand exchanged for ClO4- counter ions of the starting material . As these results, the complexes showed the formula [Pd(en)L2(ClO4)2](ClO4)2·(en) (L = Guanine, Adenine). But in the Uracil complex no exchange of the en ligand and ClO4- occured and Uracil anion preferred the N1 to N3 as coordinating site, the complex [Pd(en)2(Urac)2](ClO4)2 (Urac = Uracil anion).