Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2 Canada.
J Phys Chem A. 2011 Aug 11;115(31):8650-5. doi: 10.1021/jp205006v. Epub 2011 Jul 15.
The ground state pure rotational spectrum of silacyclobutane (SCB) (c-SiH(2)C(3)H(6)) has been investigated using both Fourier transform microwave (FTMW) and chirped pulse Fourier transform microwave (cp-FTMW) spectroscopies. Spectra of the (13)C, (29)Si, and (30)Si singly substituted isotopologues, in natural abundance, were recorded in the 6-24 GHz region along with those of the normal species. The ring inversion tunnelling splitting in the ground vibrational state was resolved and analyzed to determine the energy splitting of the two states: 75.7260(19) MHz. Structural analysis based on heavy atom substitution provided accurate geometric parameters including the bond lengths, bond angles, and ring puckering angle of the SCB ring backbone.
使用傅里叶变换微波（FTMW）和啁啾脉冲傅里叶变换微波（cp-FTMW）光谱学研究了硅环丁烷（SCB）（c-SiH(2)C(3)H(6)）的基态纯旋转光谱。在 6-24 GHz 区域记录了天然丰度下的（13)C、（29)Si 和（30)Si 单取代同位素的光谱，以及正常物种的光谱。在基频振动态中分辨并分析了环反转隧道分裂，以确定两个态的能量分裂：75.7260(19) MHz。基于重原子取代的结构分析提供了准确的几何参数，包括 SCB 环骨架的键长、键角和环扭转角。
