The synthesized title compound 8 crystallizes in three different modifications, which were investigated by electron crystallography, high resolution electron microscopy and X-ray structural analysis. The formation of molecular pairs was studied by an ab initio quantum-chemical approach. The calculated “dimers” were compared to the mutual orientations of nearest neighboring molecules in the crystal structures and to covalently bonded dimers obtained by a topochemical photodimerization.
通过电子晶体学、高分辨率电子显微镜和 X 射线结构分析,合成的标题化合物 8 结晶成三种不同的形态。分子对的形成是通过 ab initio 量子
化学方法进行研究的。将计算出的 "二聚体 "与晶体结构中最近相邻分子的相互取向进行了比较,并与通过拓扑
化学光二聚化获得的共价键二聚体进行了比较。