Structure and properties of 9-(cycloheptatrienylidene)fluorene and its derivatives

被引：9

作者：

Minabe, M

Tomiyama, T

Nozawa, T

Noguchi, M

Nakao, A

Oba, T

Kimura, T

机构：

[1] Utsunomiya Univ, Fac Engn, Dept Appl Chem, Utsunomiya, Tochigi 3218585, Japan

[2] MAV Sci Co Ltd, Kohoku Ku, Yokohama, Kanagawa 2220033, Japan

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 2001年 / 74卷 / 06期

关键词：

D O I：

10.1246/bcsj.74.1093

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

One sesquifulvalene, 9-(cycloheptatrienylidene)fluorene, was found to be composed of a flat fluorenylidene part and a non-planar cycloheptatrienylidene moiety. 1-Substituted 9-(cycloheptatrienylidene)fluorene was not obtained because of a steric repulsion between the 1-substituent and the 7 ' -hydrogen of the seven-membered ring. Upon consideration of their C-13 NMR spectra, the electronic properties of the seven-membered ring are slightly influenced by introducing a substituent (halogen, methoxy group, etc.) on the fluorenylidene part. The dissolution of 9-(cycloheptatrienylidene)fluorene in trifluoroacetic acid-chloroform afforded the (9-fluorenyl)tropylium cation. The substituent attached to the fluorene part also slightly influences the tropylium moiety.

引用

页码：1093 / 1100

页数：8

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