Restricted Rotation Involving the Tetrahedral Carbon. XV. Restricted Rotation about a C<sub>sp<sup>8</sup></sub>–C<sub>sp<sup>2</sup></sub>Bond in 9-Aryltriptycene Derivatives
作者:Mikio Nakamura、Michinori Oki
DOI:10.1246/bcsj.48.2106
日期:1975.7
A series of 9-aryltriptycene derivatives have been prepared and their internal rotation about the CAr–C9 bond has been examined by DNMR technique. The PMR behavior of these compounds is best interpreted by assuming a back and forth rotation rather than a full rotation. The barriers to rotation of compounds with one substituted benzo group have been found to be in the range 13–15 kcal/mol, whereas those