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...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.展开更多
文摘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.
