Gas-phase electron diffraction study of tris(trimethylstannyl)amine,N(SnMe3)3 |
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Authors: | L.S. Khaikin A.V. Belyakov G.S. Koptev A.V. Golubinskii L.V. Vilkov N.V. Girbasova E.T. Bogoradovskii V.S. Zavgorodnii |
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Affiliation: | Department of Chemistry, Moscow State University, Moscow 117234 U.S.S.R.;Lensovet Leningrad Technological Institute, Leningrad 198013 U.S.S.R. |
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Abstract: | The geometrical parameters of tris(trimethylstannyl)amine have been determined by gas-phase electron diffraction. The a structure has been refined using mean amplitude values calculated from the force fields of a number of tin derivatives.The experimental data are consistent with a planar bond configuration at the nitrogen in N(SnMe3)3. The final set of geometrical parameters is as follows (average bond distances, rg , in Å, angles in degrees): SnC 2.166(5), SnN 2.038(3), CH 1.117(17). NSnC 108.5(1.5), SnCH 112.1(1.6). Mean amplitude values have been varied for those distances which give considerable contributions to scattering.The results obtained fill a gap in the knowledge of structures of Group IV element μ-nitrido derivatives. They confirm the conclusion that lowering of ligand MRn electro-negativity weakens the tendency to deviation from planarity in the central fragment NM3. This tendency may be considered as a manifestation of the second-order Jahn-Teller effect. |
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