title: Di-μ2-isopropano-lato-octa-methyl-bis-(μ-4-methyl-5-sulfanyl-idene-4,5-dihydro-1H-1,2,4-triazol-1-ido-κ(2) N (1):N (2))di-μ3-oxido-tetra-tin(IV).
abstract: The tetra-nuclear title compound, [Sn4(CH3)8(C3H7O)2O2(C3H4N3S)2], lies about a center of inversion; the mol-ecule features a three-rung-staircase Sn4O4 core in which two Sn(IV) atoms are bridged by the 4-methyl-5-sulfanyl-idene-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-C2SnNO2 trigonal-bipyramidal geometry [C-Sn-C = 136.4 (1)°], whereas the central Sn(IV) 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.
authors.affiliation: Department of Chemistry, General Campus, Shahid Beheshti University, Tehran 1983963113, Iran.
authors.forename: Ezzatollah
authors.initials: E
authors.lastname: Najafi
authors.forename: Mostafa M
authors.initials: MM
authors.lastname: Amini
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng