Di-μ(2)-methano­lato-bis­(μ-4-methyl-5-sulfanyl­idene-4,5-dihydro-1H-1,2,4-triazolido-κ(2) N (1):N (2))di-μ(3)-oxido-tetra­kis­[dibutyltin(IV)]

The asymmetric unit of the title distannoxane, [Sn(4)(C(4)H(9))(8)(C(3)H(4)N(3)S)(2)(CH(3)O)(2)O(2)], contains two mol­ecules, each of which lies about an individual center of inversion. The tetra­nuclear mol­ecule features a three-rung-staircase Sn(4)O(4) core in which two independent Sn(IV) atoms are bridged by the triazolide group. The negatively charged N atom of the triazolide group binds to the terminal Sn atom at a shorter distance [Sn—N = 2.262 (3), 2.254 (3) Å] compared with the neutral N atom that binds to the central Sn atom[Sn[Image: see text]N = 2.617 (4); 2.830 (3) Å]. The oxide O atom is three-coordinate whereas the methano­late O atom is two-coordinate. The terminal Sn atom is five-coordinate in a cis-C(3)SnNO trigonal–bipyramidal environment, whereas the central Sn atom is six-coordinate in a C(2)SnNO(3) skew-trapezoidal–bipyramidal geometry.