Unique stereochemistry of 3-borabicyclo[3.3.1]nonane derivatives
作者:M. E. Gurskii、K. A. Lyssenko、A. L. Karionova、P. A. Belyakov、T. V. Potapova、M. Yu. Antipin、Yu. N. Bubnov
DOI:10.1007/s11172-005-0057-2
日期:2004.9
The conformational equilibrium in solution was examined by NMR spectroscopy for a series of 7α-phenyl-3-borabicyclo[3.3.1]nonane derivatives containing various substituents at the boron atom. The structures of these derivatives were studied in the crystalline state (X-ray diffraction analysis) and by quantum-chemical calculations (B3Pw91/6-31G*). The B...Ph transannular interactions corresponding to
溶液中的构象平衡通过核磁共振波谱检查一系列 7α-苯基-3-硼双环 [3.3.1] 壬烷衍生物在硼原子上含有各种取代基。这些衍生物的结构在结晶状态(X 射线衍射分析)和量子化学计算(B3Pw91/6-31G*)下进行了研究。与从苯基的 π 系统到 B 原子的空 p 轨道的电荷转移相对应的 B...Ph 跨环相互作用被证明是这些衍生物的椅椅构象的独特稳定性的原因。