Potassium
N-
R-sulfonyldithiocarbimates, K
2(RSO
2N
CS
2), react with K
2[PtCl
4] in water/methanol to yield complex anions bis(
N-
R-sulfonyldithiocarbimato)platinate(II), [Pt(RSO
2N
CS
2)
2]
2−, (R=C
6H
5 (
1) and 4-BrC
6H
4 (
2)) which were isolated as their
n-Bu
4N
+ salts.The single crystal X-ray analysis showed that (Bu
4N)
2[Pt(C
6H
5SO
2N
CS
2)
2] crystallizes in the triclinic space group
P1, and (Bu
4N)
2[Pt(4-BrC
6H
4SO
2N
CS
2)
2] crystallizes in the monoclinic space group
P21/c with disorder in the two chains of the two univalent Bu
4N
+ cation and 4-BrC
6H
4 groups of the anion. All complexes present a similarly distorted square-planar configuration due to the asymmetric bidentate chelation by two sulfur atoms. In both compounds the Pt atoms are in the crystallographic center of symmetry. Elemental analyses, IR spectra and electronic spectra were also consistent with the formation of platinum–sulfur diamagnetic square planar complexes. The
1H NMR,
13C NMR and
195Pt NMR spectra showed the expected signals for the
n-Bu
4N
+ cation and the anionic complexes.