(Benzyl phenyl sulfoxide-κO)dichloridodiphenyltin(IV)

The SnIV atom in the title compound, [Sn(C6H5)2Cl2(C13H12OS)], displays a distorted C2Cl2O trigonal–bipyramidal coordination environment, with a mean Sn—C distance of 2.121 (9) Å and with Sn—O = 2.331 (2) Å. The SnIV atom is displaced by 0.169 (2) Å from the equatorial C2Cl plane towards the direction of the second axially bonded Cl atom.

The Sn IV atom in the title compound, [Sn(C 6 H 5 ) 2 Cl 2 -(C 13 H 12 OS)], displays a distorted C 2 Cl 2 O trigonal-bipyramidal coordination environment, with a mean Sn-C distance of 2.121 (9) Å and with Sn-O = 2.331 (2) Å . The Sn IV atom is displaced by 0.169 (2) Å from the equatorial C 2 Cl plane towards the direction of the second axially bonded Cl atom.

Comment
Organotin compounds have received considerable attention due to their structural diversity and an increase in terms of industrial, agricultural and biological applications (Davies et al., 2008;Tian et al., 2005).
The coordination environment of the Sn IV atom in (I) can be described as a distorted trigonal bipyramid with two phenyl groups and the Cl1 atom occupying the equatorial positions whereas the axial positions are occupied by the Cl2 atom and the sulfoxide O1 atom (Fig. 1). The Sn atom is slightly displaced from the equatorial plane defined by the C 2 Cl set and is located 0.169 (2) Å in the direction of the axial Cl2 atom. The Sn-C and Sn-Cl bond lengths are similar to these found in [1,2-bis(phenylsulfinyl)ethane-κO,O]bis(dichloridodiphenyltin) (Yu et al., 1992). However, the Sn-O bond length (2.331 (2) Å) is shorter than that in the previously mentioned structure (2.417 (2) Å). The dihedral angle between the two phenyl rings bound to the Sn atom is 55.9 (2)°; the dihedral angle between the phenyl rings in the sulfoxide ligand is 34.7 (2)°.

Experimental
Benzylphenylsulfoxide (0.865 g, 4 mmol) and diphenyltin dichloride (1.374 g, 4 mmol) were refluxed in methanol (40 ml) for 1 h, and then the colorless solution was concentrated under reduce pressure and cooled. The solid product obtained was filtered off and recrystallised from ethanol. Colourless crystals suitable for X-ray analysis were obtained from the solvent by slow evaporation (yield 80%; m.p. 378-379 K).

Refinement
H atoms were placed at calculated positions (C-H = 0.97 Å for methylene and C-H = 0.93 Å for aromatic H atoms) and refined as riding with U iso (H) = 1.2U eq (C).
supplementary materials sup-2 Figures Fig. 1. The molecular structure of (I) with displacement ellipsoids drawn at the 30% probability level.