The chlorine nuclear quadrupole coupling tensor in chlorotrifluoroethylene

• Published in: Journal of molecular spectroscopy 1988-12, Vol.132 (2), p.369-379
• Main Authors: Hillig, K.W., Bittner, E.R., Kuczkowski, R.L., Lewis-Bevan, W., Gerry, M.C.L.
• Format: Article
• Language: English
• Subjects: Atomic and molecular physics; Exact sciences and technology; Fine and hyperfine structure; Molecular properties and interactions with photons; Physics; Properties of molecules and molecular ions
• ISSN: 0022-2852; 1096-083X
• DOI: 10.1016/0022-2852(88)90332-3

The 273 hyperfine components from 56 rotational transitions of chlorotrifluoroethylene were measured with a Fourier transform microwave spectrometer. A global least-squares fit was made to the rotational constants, quartic distortion constants, and 35Cl quadrupole coupling constants; the RMS deviation of the fit was 1.6 kHz. It is shown that such high-resolution measurements enable χ ab to be determined without the near degeneracies usually necessary with less precise data. The principle tensor quadrupole coupling constants are xχ zz = −77.46(10), x xx = 38.85(10), and χ yy = x cc = 38.614(3) MHz. The values are comparable to other vinyl chlorides, removing some anomalies from previous studies.