Synthesis and x-ray crystal structure of tetraethylammonium bis[1, 1-dicyanoethylene-2, 2-dithiolato]platinate(II)

Summary (NEt₄)]₂Pt(S₂C₄N₂)₂] has been prepared from K₂PtCl₄ and K₂S₂C₄N₂·H₂O with NEt₄Cl and characterized by single crystal x-ray structural analysis.The title compound crystallizes in the monoclinic space group P2₁/a witha=14.800(2),b=11.679(2),c=9.497(1) Å, =94.51(4)° andZ=2. In the complex anion Pt sits on a centre of symmetry and is coordinated by four S atoms of the ligand (S₂C₄N₂)^2– (i-mnt). The Pt–S distances are 2.315(3) and 2.316(3) Å. The intra-and interligand S–S distances are 2.807(4) and 3.682(4) Å, respectively, indicating the rectangular planar arrangement of the sulfurs about platinum. Within the isomaleonitriledithiolate there is still some suggestion of resonance indicated by the geometry of i-mnt.