Kinetic measurements of rotamer isomerization of the title compounds show that the rotational barriers in these compounds are considerably higher than those in the peri-unsubstituted and the peri-chloro or peri-methyl compounds, affording a support to our earlier finding that the rotational barrier increases and then decreases as the peri-substituent becomes bulkier in 9-t-alkyltriptycenes.
标题化合物旋转异构化的动力学测量表明,这些化合物的旋转势垒明显高于未取代的和环
氯或环
甲基化合物中的旋转势垒,这为我们早先的发现提供了支持,即旋转势垒增加然后随着周围取代基在 9-t-烷基
三烯中变得更大而减少。