The Rotational Spectrum of CBrClF2(Halon BCF): II. The Lowest Excited Vibrational States and Nuclear Quadrupole Coupling Tensors

✍ Scribed by Z. Kisiel; E. Białkowska-Jaworska; L. Pszczółkowski

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 320 KB
• Volume: 185
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1997.7379

✦ Synopsis

The analysis of the millimeter-wave rotational spectrum of the well-known halon molecule CBrClF 2 was extended to rotational transitions in the excited vibrational states £ 9 Å 1 (307 cm 01 ) and £ 5 Å 1 (337 cm 01 ). The two states are appreciably coupled by a-and b-axis Coriolis interaction which was treated explicitly and spectroscopic constants were determined from measurements at frequencies from 121 to 330 GHz and JЉ from 18 to 111. The present work, together with our previous study (1996. J. Mol. Spectrosc. 177, 240-250), results in accurate constants in the rotational Hamiltonian for the four lowest vibrational states of C 79 Br 35 ClF 2 and C 81 Br 35 ClF 2 . The double nucleus hyperfine structure in low-J transitions of the two 35 Cl isotopomers of CBrClF 2 was also measured in the region 3-14 GHz with a supersonic beam, cavity Fourier transform microwave spectrometer. All constants in both the inertial and the principal nuclear quadrupole coupling tensors have been determined for both Br and Cl nuclei.