studied concerning the importance of London dispersion driven interactions between their aryl groups. They were prepared from 1,2-dichlorotetramethyldisilane by salt elimination. Their structures were determined in the solid state by X-ray diffraction and for free molecules by gas electron-diffraction. The solid-state structures of the fluorinated and chlorinated derivatives are dominated by aryl-aryl
研究了具有两个 C6 H5 、C6 F5 或 C6 Cl5 基团的三种 1,2-二芳基四甲基二
硅烷 X5 C6 -(SiMe2 )2 -C6 X5,了解其芳基之间伦敦色散驱动的相互作用的重要性。它们是由 1,2-二
氯四甲基乙
硅烷通过脱盐法制备的。它们的固态结构通过 X 射线衍射确定,自由分子的结构通过气体电子衍射确定。
氟化和
氯化衍
生物的固态结构主要是芳基-芳基相互作用。出乎意料的是,由于强烈的分子内相互作用,Cl5 C6 -(SiMe2 )2 -C6 Cl5 在气相中仅以重叠的顺式构象异构体存在,具有强烈扭曲的 Si-C6 Cl5 单元。相比之下,F5 C6 -(SiMe2 )2 -C6 F5 表现出较弱的相互作用。通过
SAPT 计算分析了对总相互作用能的贡献。