An electron diffraction, ab initio and vibrational spectroscopic study of 1,2-di-tert-butyldisilane
作者:Drahomír Hnyk、Robert S. Fender、Heather E. Robertson、David W.H. Rankin、Michael Bühl、Karl Hassler、Karla Schenzel
DOI:10.1016/0022-2860(94)09019-l
日期:1995.2
Abstract The molecular structure of 1,2-di-tert-butyldisilane has been accurately determined by gas-phase electron diffraction (GED) and ab initio calculations. These techniques show that the large majority of molecules at room temperature have the anti conformation with overall symmetry C2, and vibrational spectra confirm this conclusion. Infrared spectra of the gas and liquid phases, and Raman spectra
摘要 1,2-二叔丁基乙硅烷的分子结构已通过气相电子衍射(GED)和从头算计算准确确定。这些技术表明,室温下大多数分子具有整体对称 C2 的反构象,振动光谱证实了这一结论。已经记录了 (CH3)3CSiH2SiH2C(CH3)3 和 (CH3)3CSiD2SiD2C(CH3)3 的气相和液相红外光谱以及液相和固相的拉曼光谱。这种结构最显着的特征 (ra) 是 SiSiC 角与母体四面体角 109.5° 的相对较大偏差 (113.7(3)°, GED; 114.4°, SCF 6-31 G * 为反形式计算)。SiSi 键长与其通常值 (234.8(3) pm, GED; 236.8 pm, SCF 6-31 G ∗ 为反形式计算)也由法向坐标分析给出的 SiSi 价力常数 (169 N m-1) 的值证实。叔丁基倾斜,因此 SiC 键 (GED ( SCF 6-31 G ∗ ): 190