Effects of Bridgehead Metalloidal Substituents (MMe<sub>3</sub>, M = Si and Sn) on the Stability of the 1-Norbornyl Cation
作者:William Adcock、Christopher I. Clark、Carl H. Schiesser
DOI:10.1021/ja961870c
日期:1996.1.1
corresponding values in the bicyclo[2.2.2]octane and adamantane ring systems (2, Y = OSO2Me, and 3, Y = Br, respectively) indicates the substrate order of these effects is 1 > 2 ≫ 3. Qualitative considerations lead to the pronounced effects in 1 being ascribed to “back-lobe” through-space effects (homohyperconjugation). A more quantitative picture of the stabilizing effects of SiMe3 and SnMe3 on the 1-norbornyl