The metallation of a series of seven planar and bent diarenes has been examined to determine the conformations of the mono- and dimetallated products. It has been found that bent diarenes can be metallated on either the convex (syn) or concave (anti) faces of the arene. In the absence of other directing groups, metallation at the concave face is favored. Dimetallation of planar diarenes results in
已经检查了一系列七个平面和弯曲的二
芳烃的
金属化,以确定单
金属化和双
金属化产物的构象。已经发现弯曲的
芳烃可以在
芳烃的凸(syn)或凹(反)面上
金属化。在没有其他导向基团的情况下,在凹面的
金属化是有利的。平面
芳烃的双
金属化导致排他的反
金属化。弯曲的
芳烃的双
金属化主要产生反式异构体,但也观察到凸面的顺式双
金属化。使用1 H和13 C NMR光谱证据进行了构象分配。