S. Ng,, Chen-Yan Wei, V. Das
Nov 10, 1987
Citations
0
Influential Citations
53
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract Tribenzyl(2-pyridinethiolato-N-oxide)tin(IV), [(C6H5CH2)3Sn(2-SC5H4NO)], crystallizes in space group P ,with a 9.169(2), b 10.498(3), c 13.511(4) A, α 91.54(2), β 104.61(2), γ 112.49(2)° and Z = 2. The structure has been refined to R = 0.028 using 4593 observed Mo-Kα reflections. The molecule adopts a configuration displaced 91% from a trigonal bipyramid to a square pyramid along the Berry pseudorotation pathway. The basal plane is composed of the oxygen and sulfur atoms of the chelating 2-pyridinethiolato ligand and the carbon atoms of two benzyl groups [SnO 2.261(2), SnS 2.577(1), SnC 2.189(3), 2.196(3) A]. The apical tincarbon bond [SnC 2.167(3) A] is shorter than the other two tincarbon bonds. The tin atom is displaced 0.64(1) A from the basal plane in the direction of the apical carbon [sum of the basal angles = 341.7(4)°] and the CapicalSn Lbasal angles are in the range 100.1(1)–110.1(1)°. The unusual geometry of tribenzyl(2-pyridinethiolato-N-oxide)tin(IV) provides the first example of polytopal dominance of the square-pyramidal configuration in pentacoordinated organotin compounds.