Dichloridodimethylbis(thiourea-κS)tin(IV)

The title compound, [Sn(CH3)2Cl2(CH4N2S)2], crystallizes with two half-molecules in the asymmetric unit. Both molecules are completed by inversion symmetry with the two SnIV atoms located on inversion centers. The metal atoms have distorted octahedral coordination environments defined by two Cl atoms, two C atoms of methyl groups and two thiourea S atoms. In the crystal, molecules are linked via N—H⋯Cl and N—H⋯S hydrogen bonds, forming a three-dimensional structure.

The title compound, [Sn(CH 3 ) 2 Cl 2 (CH 4 N 2 S) 2 ], crystallizes with two half-molecules in the asymmetric unit. Both molecules are completed by inversion symmetry with the two Sn IV atoms located on inversion centers. The metal atoms have distorted octahedral coordination environments defined by two Cl atoms, two C atoms of methyl groups and two thiourea S atoms. In the crystal, molecules are linked via N-HÁ Á ÁCl and N-HÁ Á ÁS hydrogen bonds, forming a threedimensional structure.
Supporting information for this paper is available from the IUCr electronic archives (Reference: WM5003).
The molecular structure of the two independent molecules of the title compound is illustrated in Fig. 1. The compound crystallizes with two half molecules in the asymmetric unit. Both molecules possess inversion symmetry with atoms Sn1 and Sn2 located on inversion centers, both with distorted octahedral coordination geometries resulting from two Cl atoms, two C atoms of methyl groups and two thiourea S atoms. The bond lengths and angles are similar to those observed for dichloridodimethylbis(1,3-dimethylthiourea-κS)tin(IV) (Calogero et al., 1984).
In the crystal, molecules are linked via N-H···Cl and N-H···S hydrogen bonds into a three-dimensional structure (Table 1 and Fig. 2).

Experimental
The title compound was synthesized by the reaction of dichloridodimethyltin(IV) with thiourea in a solution of absolute ethanol in a 1:2 molar ratio.

Refinement
The NH 2 H atoms were located in a difference Fourier map and refined with distance restraints: N-H = 0.86 (2) Å. The C-bound H atoms were included in calculated positions and treated as riding atoms: C-H = 0.96 Å for methyl H atoms, with U iso (H) = 1.5U eq (C).