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Acta Cryst. (2012). E68, m1545
[ doi:10.1107/S1600536812047708 ]

Di-[mu]2-ethanolato-octamethylbis([mu]-4-methyl-5-sulfanylidene-4,5-dihydro-1H-1,2,4-triazol-1-ido-[kappa]2N1:N2)di-[mu]3-oxido-tetratin(IV)

E. Najafi, M. M. Amini and S. W. Ng

Abstract: The tetranuclear title compound, [Sn4(CH3)8(C2H5O)2O2(C3H4N3S)2], lies about a center of inversion; the molecule features a three-rung-staircase Sn4O4 core in which two SnIV 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 SnIV atom at a shorter distance [Sn-N = 2.240 (3) Å] compared with the neutral N atom that binds to the central SnIV atom [Sn[leftwards arrow] N = 2.641 (3) Å]. The terminal SnIV atom is five-coordinate in a cis-C2SnNO2 trigonal-bipyramidal geometry [C-Sn-C = 127.5 (2)°], whereas the central SnIV atom is six-coordinate in a C2SnNO3 skew-trazepoidal bipyramidal geometry [C-Sn-C = 145.0 (2)°].


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