Synthesis and conformation of 2-dimethoxyphosphoryl-1,3-diselenanes. The first evidence for SeCP anomeric interactions.
作者:Marian Mikołajczyk、Maciej Mikina、Piotr Graczyk、Michał W. Wieczorek、Grzegorz Bujacz
DOI:10.1016/s0040-4039(00)79901-1
日期:1991.8
Analysis of the 1H and 13C NMR spectra of conformationally labile 2-dimethoxyphosphoryl-5,5-dimethyl-1,3-diselenane and equilibration of the diastereoisomeric cis-2 and trans-2 revealed that the anomeric effect of magnitude about ΔG° A E=10 kJmol−1 is operating in SeC- system. Crystallographic data are in accord with the interplay of the nS e -σ* C − P negative hyperconjugation and repulsive interactions