been determined in the gas phase. Me 3 GeSiCl 3 was found ab initio to possess C 3 v symmetry, with a low-lying torsional motion of the SiCl 3 group relative to the GeMe 3 group. The gas electron diffraction data were modelled with C 3 symmetry, although little deviation from C 3 v symmetry was observed. Me 2 Ge(SiCl 3 ) 2 ( C 2 v symmetry) was also found to have a very low-lying vibrational frequency
摘要在气相中测定了二甲基双(三
氯甲
硅烷基)
锗烷[Me 2 Ge(SiCl 3)2]和三甲基(三
氯甲
硅烷基)
锗烷(Me 3 GeSiCl 3)的分子结构。从头开始发现Me 3 GeSiCl 3具有C 3 v对称性,SiCl 3基团相对于GeMe 3基团具有较低的扭转运动。气体电子衍射数据用C 3对称性建模,尽管观察到与C 3 v对称性几乎没有偏差。还发现Me 2 Ge(SiCl 3)2(C 2 v对称)具有与SiCl 3基团的旋转有关的非常低的振动频率。这导致气体电子衍射数据以C 2对称性建模,观察到的SiCl 3基团与从头算出的偏光结构的组合偏差为14°。