Octa-methyldi-μ(3)-oxido-bis-(μ(2)-thio-phene-3-acetato-κO:O')(thio-phene-3-acetato-κO)tetra-tin(IV).

In the centrosymmetric title compound, [Sn(4)(CH(3))(8)(C(6)H(5)O(2)S)(4)O(2)], the central four-membered planar ring (Sn(2)O(2)) makes dihedral angles of 66.28 (12) and 77.43 (11)° with the heterocyclic rings of the bridging and monodentate ligands, respectively. One Sn(IV) atom adopts a distorted SnO(3)C(2) trigonal-bipyramidal geometry, with both C atoms in equatorial sites and the other a grossly distorted SnO(4)C(2) octa-hedral or irregular arrangement. In the crystal, the mol-ecules are connected into pillar-like polymeric units making R(2) (2)(12) ring motifs due to inter-molecular C-H⋯O inter-actions. C-H⋯π inter-actions are also present. The O atoms of the chelating ligands and the S atom of the monodentate ligand are disordered over two sets of sites in a 0.65 (6):0.35 (6) ratio.