Synthesis, characterization and crystal structures of platinum(II) saccharinate complexes with 1,5-cyclooctadiene

Abstract

Two new platinum(II) complexes, namely [PtCl(sac)(COD)] (1) and [Pt(sac) 2 (COD)] (2) (sac = saccharinate and COD = 1,5-cyclooctadiene), were synthesized and characterized by elemental analysis, IR, NMR, ESI-MSspectroscopic and thermal analysis (TG/DTA) methods. The platinum(II) complexes were prepared from the reactionof [$PtCl_2$ (COD)] with Na(sac)•$2H_2O$. The addition of the sac ligand resulted in the replacement of 1 and 2 chloridoligands in [PtCl 2 (COD)] to yield 1 and 2, respectively. The structures of the complexes were determined by singlecrystal X-ray diffraction and showed a distorted square planar coordination geometry around platinum(II). COD actedas a π -donor ligand, while sac was N -coordinated in both complexes. The TG/DTA data indicated that both complexeswere thermally stable up to 220 °C in air and their thermal decompositions yielded Pt as a final product. Complexes 1and 2 were also designed as possible precursors to synthesize new mixed-ligand platinum(II) sac complexes in a one-potreaction.