tetrafluoroborate-sensitized photoreaction of 1b, the corresponding difluorosilane and anthracene were obtained in good yields. The structural and electronic features of radical cation 1a+• were provided by semiemperical molecular orbital calculation. In addition, the structure of 1a in crystals was determined by X-ray crystallography and compared with that obtained by the calculation.
二苯并-7-
硅双环[2.2.1]庚-2,5-二烯(1a,1b)是出色的电子供体,因为CCπ键和SiCσ键的轨道之间存在有效的σ-π共轭。通过与一些电子受体的反应证明了它们的一些供体性质。当1a和1b与
四氰基乙烯混合时,观察到电荷转移络合物的容易形成。在1b的
2,4,6-三苯基吡啶四
氟硼酸酯敏化的光反应中,以良好的收率获得了相应的二
氟硅烷和
蒽。通过半经验分子轨道计算提供了自由基阳离子1a +•的结构和电子特征。另外,结构通过X射线晶体学确定晶体中的1a,并将其与通过计算获得的晶体相比较。