Structural and Conformational Properties of 2-Propenylgermane (Allylgermane) Studied by Microwave and Infrared Spectroscopy and Quantum Chemical Calculations
作者:Anne Horn、Harald Møllendal、Jean Demaison、Denis Petitprez、Juan Ramon Aviles Moreno、Abdessamad Benidar、Jean-Claude Guillemin
DOI:10.1021/jp044294c
日期:2005.5.1
using Stark and Fourier transform microwave spectroscopies, infrared spectroscopy, and high-level quantum chemical calculations. The parent species H2C=CHCH2GeH3 was investigated by microwave spectroscopy and infrared spectroscopy, while three deuterated species, namely, H2C=CDCH2GeH3, H2C=CHCHDGeH3, and H2C=CHCH2GeD3, were studied only by infrared spectroscopy. The microwave spectra of the ground vibrational
烯丙基锗烷的结构和构象性质已通过Stark和Fourier变换微波光谱,红外光谱和高级量子化学计算进行了研究。通过微波光谱法和红外光谱法研究了母体物质H2C = CHCH2GeH3,而仅通过红外光谱法研究了三种氘代物质,即H2C = CDCH2GeH3,H2C = CHCHDGeH3和H2C = CHCH2GeD3。围绕一个构象异构体的70Ge,72Ge和74Ge异构体分配了围绕sp2-sp3碳-碳键的基振动态和扭转振动的第一激发态的微波光谱。该旋转异构体具有对于C = CC-Ge原子链的背斜排列。已指定了500-4000 cm(-1)范围内的气体的红外光谱。在微波和红外光谱中没有观察到除斜纹棉布以外的其他旋转异构体形式的证据。已经进行了几种不同的高级从头计算和密度泛函理论计算。这些计算表明,具有原子的C = CC-Ge键的同上平面构象的较不稳定的形式可以与背斜形式并存。取决于计算程序,计算了平面上和背斜形式之间的能量差为5