Studies on Molecular Systams Formed by Novel Interactions

(1)硅烷-水络合物的转动光谱和分子结构我们观察到的转动光谱与文献报道的含有T_d对称分子的络合物的转动光谱完全不同。观测数据表明，该配合物是一种全新的类型，其Si-O距离短而硬，内部运动主要是围绕Si-O轴的内旋转。有人还建议，观察到的每个旋转线的小分裂是由硅烷的内部运动。(2)本文测量了SiH_4-Ar和SiD_4-Ar的转动光谱。前者的A和E成分出现的顺序与通常预期的相反。几套潜在的功能，假设为硅烷-氩相互作用，以解释所观察到的光谱分裂，但分裂的同位素物种的异常依赖性尚未得到解释。(3)Na_3的B-X跃迁分析本文从群论出发，导出了B态赝转动的哈密顿量，并应用于光谱分析。包含在哈密顿量中的七个参数再现了所观察到的光谱，标准偏差为0.012 cm-2<-1>。(4)成功地分析了甲醇二聚体的16个K=0能级和32个K=1能级的跃迁，确定了四种隧穿分裂。

(1) Rotational Spectrum and Molecular Structure of the Silane-Water ComplexWe observed the rotational spectra which completely differ from those reported for complexes containing a T_d symmetry molecule. The observed data led to the conclusions that the complex is of completely new type with a short and hard Si-O distance and that the main internal motion is the internal rotation around the Si-O axis. It was also suggested that small splittings observed for each rotational line are caused by the internal motion of silane.(2) Rotational spectrum of the Silane-Argon ComplexThe spectrum was measured for both SiH_4-Ar and SiD_4-Ar. The A and E components of the former appeared in the order opposite to that normally expected. Several sets of potential functions were assumed for the silane-argon interaction in order to explain the observed splittings of the spectra, but the anomalous dependence of the splittings on isotopic species has not been explained.(3) Analysis of the B-X Transition of Na_3A Hamiltonian for the pseudo-rotation in the B state was derived based upon a group-theoretical consideration and was applied to the analysis of the observed spectra. Seven parameters included in the Hamiltonian reproduced the observed spectra with the standard deviation of 0.012 cm^<-1>.(4) Analysis of the Methanol DimerTransition involving 16 K=0 levels and 32 K=1 levels were successfully analyzed, resulting in determination of four kinds of tunneling splittings.