Rovibrational study of the ν 2 + ν ±14, ν 2 + 3ν ±16, ν 1 + ν ±15, ν ±14 + ν ±15, ν ±14 + ν ±5, ν ±5 + 3ν ±16, ν ±5 + 3ν ±36 and ν 1 + ν 2 infrared bands of CH 335Cl studied in a high-resolution FTIR spectrum from 4250 to 4600 cm -1
Abstract
About 6400 lines belonging to the ν 2 + ν ±14, ν 2 + 3ν ±16, ν 1 + ν ±15, ν ±14 + ν ±15, ν ±14 + ν ±5, ν ±5 + 3ν ±16 and ν ±5 + 3ν ±36 bands have been assigned. An r.m.s. deviation of 0.047 cm -1 has been achieved by a least-squares fit of 1427 lines. For this purpose, a simplified model, taking into account five anharmonic resonances already found in a previous work [ Molec. Phys. 70, 849 (1990)] and the well known x-y Coriolis resonance between the ν 2 and ν 5 modes of methyl halides, was used. Although not observed, the ν ±14 + ν ±15 and ν 1+ ν 2 parallel bands are strongly coupled by Coriolis resonance to ν 2 + ν ±14 and ν ±15 respectively. A few secondary resonances remain unexplained in several parts of the spectrum.
- Publication:
-
Spectrochimica Acta Part A: Molecular Spectroscopy
- Pub Date:
- January 1993
- DOI:
- 10.1016/0584-8539(93)80258-C
- Bibcode:
- 1993AcSpA..49...31N