Molecular structure and internal rotation of CH2Cl group of chloropropanone oxime: gas electron diffraction, microwave spectroscopy, and quantum chemical calculation studies
作者:Nobuhiko Kuze、Takashi Watado、Yuri Takahashi、Takeshi Sakaizumi、Osamu Ohashi、Minako Kiuchi、Kinya Iijima
DOI:10.1007/s11224-015-0649-x
日期:2015.12
The molecular structure of chloropropanone oxime [ClCH2C(CH3)=NOH] has been determined by gas electron diffraction (GED), microwave spectroscopy (MW) and quantum chemical calculations. Potential energy curves for the internal rotation of CH2Cl group in (E)- and (Z)-isomers as well as the optimized geometries and force constants for four conformations have been calculated by the quantum chemical calculations
氯丙酮肟的分子结构 [ClCH2C(CH3)=NOH] 已通过气体电子衍射 (GED)、微波光谱 (MW) 和量子化学计算确定。已经通过量子化学计算计算了 (E)- 和 (Z)-异构体中 CH2Cl 基团内部旋转的势能曲线以及四种构象的优化几何形状和力常数。GED 和 MW 数据的组合数据分析揭示了 68(4)% (E)-背斜和 32% (Z)-向斜构象异构体的构象混合物。E-背斜构象异构体几何参数的主要值是:rg(ClH2C–C) = 1.499(2) Å, rg(C–CH3) = 1.503(2) Å, rg(C=N) = 1.276(4) ) Å, rg(C–Cl) = 1.805(3) Å, rg(N–O) = 1.398(4) Å, ∠αC–C=N = 113.2(16)°, ∠αC–C–Cl = 111.1 °(5), ∠αH3C–C=N = 127.0°(13), ϕ(NCCCl)