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The title distannoxane, [Sn 4 (CH 3 ) 8 (C 3 H 4 N 3 S) 2 (CH 3 O) 2 O 2 ], lies about a center of inversion; the tetra­nuclear mol­ecule features a three-rung-staircase Sn 4 O 4  core in which the two crystallographically 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 = 2.239 (2) Å] compared with the neutral N atom that binds to the central Sn atom [Sn← N = 2.757 (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.

acta crystallographica. section e

Di-μ2-methanolato-bis(μ-4-methyl-5-sulfanylidene-4,5-dihydro-1H-1,2,4-triazolido-κ2N1:N2)di-μ3-oxido-tetrakis[dimethyltin(IV)]