1-Methoxy-1-silacyclohexane: Synthesis, molecular structure and conformational behavior by gas electron diffraction, Raman spectroscopy and quantum chemical calculations
作者:Sergey A. Shlykov、Boris V. Puchkov、Ingvar Arnason、Sunna Ó. Wallevik、Nina I. Giricheva、Georgiy V. Girichev、Yuriy A. Zhabanov
DOI:10.1016/j.molstruc.2017.10.088
日期:2018.2
exist as a mixture of two conformers, gauche- axial and gauche -equatorial, with almost equal contributions, while the trans -forms are much less stable. In addition, theoretical calculations on the cyclohexane analog, methoxycyclohexane 2 , are performed in order to compare with the conformational properties of 1 . The latter is predicted not to diminish the axial/equatorial ratio, as contrasted to
摘要 报告了气体电子衍射 (GED)、温度相关拉曼光谱的合成和结果,以及 1-甲氧基-1-硅环己烷 1 的详细量子化学 (QC) 研究。在 QC 结果系列、DFT(B3LYP、PBE0、M06、M062X) 和 MP2 中,构象偏好预测相当矛盾。从所应用的 GED 和拉曼实验方法中,发现 1 的气相和液相作为两种构象异构体的混合物存在,gauche-axis 和 gauche-equatorial,贡献几乎相等,而反式则不太稳定. 此外,还对环己烷类似物甲氧基环己烷 2 进行了理论计算,以便与 1 的构象特性进行比较。预计后者不会减少轴向/赤道比,