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Di-μ2-isopropanolato-octamethylbis(μ-4-methyl-5-sulfanylidene-4,5-dihydro-1H-1,2,4-triazol-1-ido-κ2N1:N2)di-μ3-oxido-tetratin(IV)

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Author(s): Ezzatollah Najafi | Mostafa M. Amini | Seik Weng Ng

Journal: Acta Crystallographica Section E
ISSN 1600-5368

Volume: 68;
Issue: 12;
Start page: m1546;
Date: 2012;
Original page

ABSTRACT
The tetranuclear title compound, [Sn4(CH3)8(C3H7O)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 = 2.236 (2) Å] compared with the neutral N atom that binds to the central SnIV atom [Sn← N = 2.805 (2) Å]. The terminal SnIV atom is five-coordinate in a cis-C2SnNO2 trigonal–bipyramidal geometry [C—Sn—C = 136.4 (1)°], whereas the central SnIV atom is six-coordinate in a C2SnNO3 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.
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