摘要
The five-coordinate bicycloazastannoxides (l-6) in the presence of Et3N has been investigated by 1H NMR spectrograph. It has been found that the deuterium exchange of αCH of five-coordinate bicycloazastannoxides with CD3OD takes place, which is catalyzed by Et3N. In the presence of Et3N (2 μL) , the apparent rate constants (κobs) forthe deuterium exchange in CD3OD is determined by H NMR method, and the value of κobs is in the range of (2.05-10.8)×10-4s-1.The effect of the substitutes on the rates and the kinetic mechanism are discussed.
The five-coordinate bicycloazastannoxides （1—6） in the presence of Et<sub>3</sub>N has been investigated by<sup>1</sup>H NMR spectrograph. It has been found that the deuterium exchange of αCH of five-coordinate bicycloazastannoxides with CD<sub>3</sub>OD takes place, which is catalyzed by Et<sub>3</sub>N. In the presence of Et<sub>3</sub>N （2μL）, the apparent rate constants (k<sub>obs</sub>) for the deuterium exchange in CD<sub>3</sub>OD is determined by<sup>1</sup>H NMR method, and the value of k<sub>obs</sub> is in the range of （2.05--10.8）×10<sup>-4</sup> s<sup>-1</sup>. The effect of the substitutes on the rates and the kinetic mechanism are discussed.
