Restricted rotation involving the tetrahedral carbon.: LXIV.: Barriers to rotation of s-alkyl groups in 9-s-alkyl-8,13-difluoro-1,4-dimethyl- and 1,2,3,4-tetrachloro-triptycenes

被引：6

作者：

Oki, M ^{[1
]}

Nishino, M ^{[1
]}

Kaieda, K ^{[1
]}

Nakashima, T ^{[1
]}

Toyota, S ^{[1
]}

机构：

[1] Okayama Univ Sci, Fac Sci, Dept Chem, Okayama 7000005, Japan

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 2001年 / 74卷 / 02期

关键词：

D O I：

10.1246/bcsj.74.357

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

9-(3-Acetoxy-1-methylpropyl)-8,13-difluoro-1,4-dimethyltriptycene and 9-(1-methyl-2-propenyl)-8,13-difluoro-1,4-dimethyl- and 1,2,3,4-tetrachloro-triptycenes were prepared. Their barriers to internal rotation around the C(9)-C(alkyl) bonds were measured by the classical kinetics. The barrier was affected a little by the substituent, being ca. 25-26 kcal mol(-1). Rotamer distributions in these compounds and possible causes for these indifferent barriers to rotation are discussed.

引用

页码：357 / 361

页数：5

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