Diastereotopy of equatorial fluorines at the trigonal-bipyramidal silicon atom in organyl [β-(Trifluorosilyl)ethyl] sulfoxide molecules
作者:V.A. Pestunovich、M.F. Larin、M.S. Sorokin、A.I. Albanov、M.G. Voronkov
DOI:10.1016/0022-328x(85)87077-7
日期:1985.1
The low temperature 19F NMR spectra of RS(O)CH2CH2Sif3 (R = CH3, C2H5 or C6H5CH2) display a non-equivalence of all the fluorine atoms in their molecules. This is caused by both the trigonal-bipyramidal structure of the silicon atom involved in the intramolecular Si←O coordination and the chirality of the sulfur atom. The FeF′e coupling constants have been determined to be lower than the FeFa values
RS(O)CH 2 CH 2 Sif 3(R = CH 3,C 2 H 5或C 6 H 5 CH 2)的低温19 F NMR光谱显示分子中所有氟原子均不等价。这是由分子内Si←O配位中所涉及的硅原子的三角-双锥体结构和硫原子的手性引起的。在F è F' é偶合常数已被确定为比F下Ë F一个值。