moiety). The barriers for the cis/trans interconversion of the phenyl groups by planar nitrogen inversion have been determined. In the cases of anthracene and anthraquinone derivatives, the presence of syn and anti conformers was detected, and their interconversion barriers, due to the Ar−N rotation, were measured. At very low temperature, restricted rotations of the phenyl groups, displaying barriers
芳族二亚
氨基衍
生物,其具有两个N═CPh 2已经通过可变温度NMR光谱,X射线衍射和DFT计算研究了在
蒽醌,
蒽,
联苯和
萘环的1,8位上键合的部分。在所有化合物中,亚
氨基取代基基本上垂直于芳族平面,并且键合至C═N碳上的苯基是非对映体的(即,顺式或反式与N═C部分的芳族N-取代基相连)。已经确定了通过平面氮转化进行苯基的顺式/反式相互转化的障碍。在
蒽和
蒽醌衍
生物的情况下,检测到顺式和反式构象异构体的存在,并测量了由于Ar-N旋转而引起的相互转化障碍。在非常低的温度下,苯基的旋转受限制,显示出4范围内的势垒。对于所有化合物也观察到-1:发现顺式旋转的障碍大于反式苯基。