作者:Gaku Yamamoto、Masahiko Suzuki、Michinori Oki
DOI:10.1246/cl.1980.1523
日期:1980.12.5
Rotational barrier in 1,2,3,4-tetrachloro-9-(1,1-dimethyl-2-phenylethyl)triptycene was 1.8 kcal/mol lower than that in the corresponding 1,4-dichloro derivative. This apparently anomalous “reverse” buttressing effect may be originated from the tilting of the 9-substituent away from the peri-chloro group in this highly congested system.
1,2,3,4-四氯-9-(1,1-二甲基-2-苯基乙基)三庚烯的旋转障碍比相应的 1,4-二氯衍生物低 1.8 kcal/mol。这种明显反常的 "反向 "加压效应可能是由于在这个高度拥挤的体系中,9-取代基远离了近氯基团。