Di-μ(2)-isopropano­lato-octa­methyl­bis­(μ-4-methyl-5-sulfanyl­idene-4,5-dihydro-1H-1,2,4-triazol-1-ido-κ(2) N (1):N (2))di-μ(3)-oxido-tetra­tin(IV)

The tetra­nuclear title compound, [Sn(4)(CH(3))(8)(C(3)H(7)O)(2)O(2)(C(3)H(4)N(3)S)(2)], lies about a center of inversion; the mol­ecule features a three-rung-staircase Sn(4)O(4) core in which two Sn(IV) atoms are bridged by the 4-methyl-5-sulfanyl­idene-4,5-dihydro-1H-1,2,4-triazol-1-ide group. The negatively charged N atom of the group binds to the terminal Sn(IV) atom at a shorter distance [Sn—N = 2.236 (2) Å] compared with the neutral N atom that binds to the central Sn(IV) atom [Sn← N = 2.805 (2) Å]. The terminal Sn(IV) atom is five-coordinate in a cis-C(2)SnNO(2) trigonal–bipyramidal geometry [C—Sn—C = 136.4 (1)°], whereas the central Sn(IV) atom is six-coordinate in a C(2)SnNO(3) skew-trazepoidal bipyramidal geometry [C—Sn—C = 145.4 (1)°]. The C atoms of the isopropoxy group are disordered over two positions in a 0.591 (7):0.409 (7) ratio.