ClCH2CH2OH
2-Chloroethanol, 35Cl isotopolog
Species tag 080510
Version1*
Date of EntryOct. 2026
ContributorH. S. P. Müller

The entry refers to the Gg' lowest energy conformer. Transition frequencies were taken from
(1) H. A. Bunn, H. H. Liang, B. J. Esselman, P. L. Raston, A. Pracko, S. Shipman, B. Billinghurst, J. Zhao, J. K. Jørgensen, and S. L. Widicus Weaver, 2026, ACS Earth Space Chem. 10, 2402.
The treatment here is slightly different frrom the one in (1). The calculation is given with 35Cl HFS splitting even though the splitting is (largely) collapsed at higher quantum numbers or frequencies. The calculation should be sufficiently accurate for astronomical observations.
The dipole moment components were taken from
(2) R. M. Soliday, H. Bunn, I. Sumner, and P. L. Raston, 2019, J. Phys. Chem. A 123, 1208.
Please note that the a-dipole moment component is not zero, but nearly so.

Lines Listed64663
Frequency / GHz< 1000
Max. J113
log STR0-10.5
log STR1-6.0
Isotope Corr. 
Egy / cm–10.0
 µa / D 
 µb / D1.474
 µc / D0.328
 A / MHz12747.961
 B / MHz3505.774
 C / MHz2981.273
 Q(300.0)304750.7932
 Q(225.0)197764.9494
 Q(150.0)107559.5818
 Q(75.00)38004.3470
 Q(37.50)13438.7438
 Q(18.75)4756.1976
 Q(9.375)1685.6232
 Q(5.000)659.4107
 Q(2.725)267.4132
detected in ISM/CSMno


Database maintained by Holger S. P. Müller and Sven Thorwirth, programming by D. Roth and F. Schlöder