The reaction of 4-iodobenzenesulfonamide or 4-fluorobenzenesulfonamide with CS 2 and KOH in dimethylformamide yielded the potassium N-R-sulfonyldithiocarbimates, K 2 (RSO 2 N@CS 2) [R = 4-IC 6 H 4 (1) and 4-FC 6 H 4 (2)]. These salts reacted with K 2 [PtCl 4 ] in water/methanol to yield complex anions bis(N-R-sulfonyldithiocarbimato)platinate(II), which were isolated as their tetrabutylammonium salts, (Bu 4 N) 2 [Pt(RSO 2 N@CS 2) 2 ] [R = 4-IC 6 H 4 (3) and 4-FC 6 H 4 (4)]. The structures of 2-4 were determined by X-ray crystallography. The Pt 2+ in both complexes 3 and 4 lies at the inversion centre and the PtS 4 moiety has a distorted square-planar configuration. The compounds were also characterized by IR, 1 H NMR and 13 C NMR spectroscopies, and elemental analyses. The molar conductance data are consistent with the fact that 3 and 4 are dianionic complexes.

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Two new zinc(II)-complexes, dithiocarbimato (Ph 4 P) 2 [Zn(CH 3 SO 2 N@CS 2) 2 ] (1) and trithiocarbimato (Ph 4 P) 2 [Zn(CH 3 SO 2 N@CS 3) 2 ] (2), were obtained in the crystalline form by the reaction of potassium N-methylsulfonyldithiocarbimate (RSO 2 N@CS 2 K 2) with zinc(II) acetate dihydrate and tetraphenylphosphonium chloride in dimethylformamide. Both complexes crystallize in the monoclinic system. The central Zn(II) ion has a distorted tetrahedral coordination in both compounds. In 1 the dithiocarbimato ligand coordinates via two S atoms while in 2 the trithiocarbimato ligand coordinates via S and N atoms. Both complexes were also characterized by IR, 1 H NMR and 13 C NMR spectroscopies. Compound 2 is the first example of a zinc(II)-trithiocarbimato complex.