Solid ternary complex [Pd(phen)Cl₂] (1) was synthesized and characterized. Complex 1 was reacted with adenine (ade) of DNA and single crystal of binuclear complex [Pd₂(phen)₂(ade)₂]Cl₂•4.5H₂O (2) was obtained. Complex 2 belongs to orthorhombic system with space group Pnma, a＝2.1709(9) nm, b＝1.4378(6) nm, c＝1.2274(5) nm, α＝β＝γ＝90°, V＝3.8311(3) nm³, D_c＝1.729 g/cm³, Z＝4, F(000)＝2004, R₁＝0.0766, wR₂＝0.1526. Two nitrogen atoms of phen and N(3), N(9) of ade coordinated with Pd(II).

Key words: palladium(II), adenine, complex