Syntheses, structural and spectroscopic characterization of novel zinc(II)-bis(trithiocarbimato) complexes and bis( N-methylsulfonyldithiocarbimate)-sulfide

Abstract

Four zinc(II)-bis(trithiocarbimato) complexes with the general formula A 2[Zn(RSO 2N CS 3) 2] [A = Ph 4P +: R = CH 3 ( 1), 4-CH 3C 6H 4 ( 2); A = Bu 4N +: R = CH 3 ( 3), 4-CH 3C 6H 4 ( 4)] were obtained by the reaction of sulfur with the correspondent zinc(II)-bis(dithiocarbimato) complexes. Additionally, the compound (Ph 4P) 2[(CH 3SO 2N CS 2) 2S)] ( 5) was prepared from the potassium methylsulfonildithiocarbimate by oxidation with iodine. The compounds were characterized by elemental analyses and IR, 1H NMR and 13C NMR spectroscopies. The compounds 4 and 5 were also characterized by X-ray diffraction techniques. The compound 4 crystallizes in the centrosymmetric space group C2/c of the monoclinic system. The Zn(II) is in a distorted tetrahedral environment (ZnS 4) in compound 4, and differ from the coordination mode observed in compound 1, which involves one sulfur and one nitrogen atom of each trithiocarbimate ligand. Compound 5 is the first example of a compound containing a bis( N-alkylsulfonyldithiocarbimate)-sulfide dianion and crystallises in the non-centrosymmetric space group P4 12 12 of the tetragonal system.