Synthesis and structural characterization of 2-(-)-menthoxycarbonylethyltin compounds

摘要

The title compounds, (-)-MenOCOCH(2)CH(2)SnCl(n)Ph(3-n) (n = 0, 1; 1, 2 - 2, 3; 3, 4) and [(-)-MenOCOCH(2)CH(2)Sn(OH)Cl-2](2) center dot 2(C2H5)(2)O (5 center dot 2(C2H5)(2)O) were synthesized and characterized by means of elemental analysis, IR and NMR (H-1, C-13 and Sn-119) spectra. The solid-state structures of the compounds 1, 3 4 and 5 center dot 2(C2H5)(2)O have been determined by X-ray diffraction methods. The tin atom in I possesses a distorted tetrahedral geometry with an intramolecular weak C=O center dot center dot center dot Sn interaction of 3.342(4) angstrom. The compounds 3 and 4 have distorted trigonal bipyramidal geometry, in which there is an intramolecular carbonyl-to-tin coordination. The tin atom in 5 center dot 2(C2H5)(2)O approximates to octahedral geometry via an intramolecular carbonyl-to-tin coordination and hydroxo-bridging. The strengths of the interaction between C=O and Sri generally increase in the order 1 < 2 < 3 < 4 < 5 2(C2H5)(2)O. (c) 2005 Elsevier Ltd. All rights reserved.