Bulletin of the Chemical Society of Japan

Restricted rotation involving the tetrahedral carbon. XXXV. Stereodynamics of 9-(3, 5-dimethylbenzyl) triptycene derivatives.

G Yamamoto, M Oki

文献索引：Yamamoto, Gaku; Oki, Michinori Bulletin of the Chemical Society of Japan, 1981 , vol. 54, # 2 p. 473 - 480

全文：HTML全文

被引用次数: 31

摘要

Stereodynamics of a variety of 9-(3, 5-dimethylbenzyl) triptycene derivatives was studied. Atropisomerism about the bridgehead-to-methylene bond was realized in a triply peri- substituted derivative, 8, 13-dichloro-1, 4-dimethyl-9-(3, 5-dimethylbenzy) triptycene: the activation enthalpy for the ap→±sc conversion was 26.4 kcal/mol. Barriers to rotation about the bridgehead-to-methylene bond in a variety of triply, doubly, and singly peri-substituted ...