Dore L, Kisiel Z
Dipartimento di Chimica "G. Ciamician,", Università di Bologna, Via Selmi 2, Bologna, 40126, Italy
J Mol Spectrosc. 1998 Jun;189(2):228-34. doi: 10.1006/jmsp.1998.7542.
The hyperfine structure in the J = 1 <-- 0 and J = 2 <-- 1 transitions of 35Cl3CCH3 and 35Cl237ClCCH3 was resolved by utilizing the sub-Doppler resolution of a pulsed supersonic beam, cavity Fourier transform microwave (FTMW) spectrometer. The complete inertial and principal quadrupole tensors of the chlorine nuclei are determined. The symmetric top treatment for 35Cl3CCH3 and the asymmetric top treatment for 35Cl237ClCCH3 are found to yield identical results for the principal tensor components of the 35Cl nucleus. The quadrupole asymmetry parameter eta for the chlorine nuclei in 1,1,1-trichloroethane is small, which indicates nearly cylindrical symmetry of the field gradient. Nevertheless, there is evidence for some deviation of the z symmetry axis of the field gradient from the direction of the C-Cl bond. Copyright 1998 Academic Press.
利用脉冲超声束腔傅里叶变换微波（FTMW）光谱仪的亚多普勒分辨率，分辨出了(^{35}Cl_3CCH_3)和(^{35}Cl_2^{37}ClCCH_3)在(J = 1\leftarrow0)和(J = 2\leftarrow1)跃迁中的超精细结构。确定了氯核的完整惯性张量和主四极张量。对于(^{35}Cl)核的主张量分量，发现对(^{35}Cl_3CCH_3)采用对称陀螺处理以及对(^{35}Cl_2^{37}ClCCH_3)采用非对称陀螺处理会得到相同的结果。1,1,1 - 三氯乙烷中氯核的四极不对称参数(\eta)很小，这表明场梯度几乎呈圆柱对称。然而，有证据表明场梯度的(z)对称轴与(C - Cl)键的方向存在一些偏差。版权所有1998年学术出版社。
