sets were employed. Determination of structural parameters in the gas phase by gas electron diffraction confirmed the computed predictions for all three compounds. For 2 and 3, the ratios of antiperiplanar to synclinal conformer were detected to be 90:10 (328 K) and 72:28 (293 K), respectively, by gas electron diffraction. The experimentally determined GeGe bond lengths in 1, 2, and 3 in the gas phase
进行了从头算计算,以研究甲基化的Digermanes hexamethyldigermane Me(3)GeGeMe(3)(1),dichlorotetramethyldigermane Me(2)ClGeGeClMe(2)(2)和tetramethyldigermane Me( 2)
HGeGeHMe(2)(3)。在理论的DFT和MP2级别采用了不同的基础集[6-31 + G(d),
SDD,aug-cc-pVTZ]来优化结构并计算能量和振动频率。对于1,一个代表交错结构的最小值位于势能表面上。对于2和3,发现具有C 2对称性的反周平面构象是全局最小值。另外,当使用某些基础集时,对向斜最小定位为2和3。通过气相电子衍射确定气相中的结构参数,证实了对所有三种化合物的计算预测。对于2和3,通过气体电子衍射检测到,腹膜外顺应形与顺眼顺应形的比例分别为90:10(328 K)和72:28(293 K