CHLORURE DE CIS-CHLORO(DIMETHYL SULF-OXYDE)(METFORMINE)PLATINE(II)

In this cis-chloro(dimethyl sulfoxide)(metformin)platinum(II) chloride complex (metformin is 1,1-dimethylbiguanide), [PtCl(C4H11N5)(C2H6OS)] Cl, the coordination about the Pt atom is square planar, involving Cl, S and two N atoms. The N atoms are in cis positions and belong to the metformin ligand. In the complex cation, the metformin-Pt ring is app roximately planar. There is a delocalized orbital over the biguanide g roup. An N-H ... O intramolecular hydrogen bond [2.75 (1) Angstrom] fo rms a pseudo five-membered ring. Several N-H ... Cl intermolecular hyd rogen bonds take part in the cohesion of the structure.