The synthesis and crystal and molecular structures of the platinum(II) complex
Pt(HL)Cl where H2L is the diacid diamide –[CH2N(CH2COOH)CH2CONH2]2, a
hydrolytic metabolite of an antitumour active bis(3,5-dioxopiperazin-1-yl)alkane are
reported. The complex is square planar and contains HL− as a tridentate 2N (amino),
O (carboxylate) donor. The metal to ligand bond distances are Pt-Cl 2.287(1) Å, Pt-O
2.002 (1) Å, Pt-Ntrans Cl 2.014(1) Å and Pt-Ntrans O 2.073 Å. There is extensive
hydrogen bonding, each molecule of Pt(HL)Cl being intermolecularly hydrogen
bonded to ten others giving a 3-dimensional network. There is also one
intramolecular H-bond.