X-ray, and quantum-chemical methods. The free activation parameters for the inversion of “ammonium-amine nitrogen” and the chirality change at the pentacoordinated silicon were determined by dynamic NMR spectroscopy. The latter proceeds via the dissociation of SiO bonds. The results were confirmed by quantum-chemical calculations, the experimental observation of cross-peaks in 2D-EXSY NMR spectra, and
1-(N,N-取代-
氨基甲基)spirobi[3-oxo(2,5-dioxa-1-silacyclopentan)] 使用核磁共振、X 射线和量子
化学方法进行了研究。通过动态核磁共振光谱确定了“
铵-胺氮”转化的自由活化参数和五配位
硅的手性变化。后者通过 SiO 键的解离进行。结果通过量子
化学计算、2D-EXSY 核磁共振谱中交叉峰的实验观察和螺环交换反应得到证实。分析了溶液中不同非对映异构体之间的转变途径。