Microwave Spectrum of the Ethylmethyl Ether Molecule

Molecules

Shozo Tsunekawa¹  Yuji Kinai¹  Yuki Kondo¹  Hitoshi Odashima¹ 

[1] Department of Physics, Toyama University, Gofuku, Toyama, 930-8555, Japan

关键词: Ethylmethyl ether;    spectroscopy;    microwave;   

DOI  :  10.3390/80100103

来源: mdpi

【 摘 要 】

We have observed rotational transitions of ethylmethyl ether (CH₃CH₂OCH₃) in the 24-110 GHz frequency range. We newly assigned the transitions of four Q-branch series for J=1-38 with Ka=0-5 and six R-branch series of b-type transitions for J=7-37 with Ka=0-3. All these assigned transitions were observed to be split into two or four components due to the internal rotations of the methyl groups. We analyzed the averaged frequencies of the split components on the basis of the Watson A-reduced Hamiltonian, neglecting the effect of the internal rotations. A total of 122 transitions were fitted to eight molecular parameters to a 1s standard deviation of 24 kHz. The parameters A, B, C and DJ were improved, and D_JK, D_k, d_J and d_K were determined for the first time.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.