Crystal structure and anti-cancer activity of a novel mixed-ligand complex [Pd(Phen)(Phe)]Cl · H2O

A mixed-ligand complex [Pd(Phen)(Phe)]Cl·H 2 O (Phen- o -phenantroline, Phe-L-phenylalanine) is synthesized and structurally characterized by elemental analyses and single-crystal X-ray diffraction. Diffraction data: C 21 H 19 ClN 3 O 3 Pd, monoclinic, P 2 1 / n , a = 9.478(4) Å, b = 22.395(9) Å, c = 9.528 (4) Å, β = 104.358(11)°, V = 1959.3(14) Å 3 , Z = 4. The Pd atom has planar-square coordination geometry and is surrounded by the Phen and Phe ligand to form a monovalent complex cation, Cl − is filled in the crystal lattice as a counterion. The Cl atom is bonded to the complex cation through an electrostatic interaction and has a very weak hydrogen bond with a water molecule. Hydrogen bonding interactions and π-π stacking interactions stabilize the crystal lattice. The anti-cancer activity of the complex increases with the increasing concentration of the complex, which shows that the complex has strong anti-cancer activity.