Abstract

[Pt(Me 2pipdt) 2](BF 4) 2 salts [Me 2pipdt = N, N ′-dimethyl-piperazine-2,3-dithione] bearing cationic dithiolene complexes react with (Bu 4N) 2[Pt(X) 4] (X = SCN, CN) to form [Pt(Me 2pipdt) 2][Pt(SCN) 4 ] ( 1) and [Pt(Me 2pipdt) 2][Pt(CN) 4] ( 2) salts by metathesis. Black crystals of 1 have been structurally characterized showing that the two metals lie on inversion centers and exhibit a square planar coordination. The Pt–S bond distances in the anion complex (2.324(2) Å) are longer than in the cation complex (2.280(2) Å) whereas the C–S bond distances are shorter in SCN − (average 1.669 Å) than in Me 2pipdt (average 1.694 Å). The chelating Me 2Pipdt ligand is found disordered in the λ/ δ conformations with site occupancies of 50/50, respectively. The cation and anion complexes run parallel to a.

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