Preparation and Crystal Structure of a Platinum(II) Complex of [CH(2)N(CH(2)COOH)CH(2)CONH(2)](2), the Hydrolysis Product of an Anti-Tumour Bis(3,5-Dioxopiperazin-1-YL)Alkane.

The synthesis and crystal and molecular structures of the platinum(II) complex Pt(HL)Cl where H(2)L is the diacid diamide -[CH(2)N(CH(2)COOH)CH(2)CONH(2)](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) A, Pt-O 2.002 (1) A, Pt-N(trans Cl) 2.014(1) A and Pt-N(trans O) 2.073 A. 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.