Structure and Properties of 9-(Cycloheptatrienylidene)fluorene and Its Derivatives
作者:Masahiro Minabe、Takashi Tomiyama、Toshiya Nozawa、Makoto Noguchi、Akiko Nakao、Toru Oba、Takao Kimura
DOI:10.1246/bcsj.74.1093
日期:2001.6
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 13C NMR spectra, the electronic properties
发现一种倍半富瓦烯,9-(环庚三叉)芴,由平坦的芴部分和非平面的环庚三叉部分组成。由于 1-取代基与七元环的 7'-氢之间存在空间排斥,因此未获得 1-取代的 9-(环庚三亚基)芴。考虑到它们的 13C NMR 光谱,在亚芴部分引入取代基(卤素、甲氧基等)会轻微影响七元环的电子特性。9-(环庚三叉基)芴在三氟乙酸-氯仿中的溶解得到(9-芴基)托鎓阳离子。连接到芴部分的取代基也略微影响了 tropylium 部分。