High-resolution TDL spectroscopy of the [nu][sub 6] band of CH[sub 2] [double bond] CH[sup 37]Cl

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Journal of Molecular Spectroscopy; (United States)

DOI:https://doi.org/10.1006/jmsp.1994.1097· OSTI ID:7297727

Giorgianni, S; De Lorenzi, A; Stoppa, P; Baldan, A; Ghersetti, S ^[1]

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1. Univ. di Venezia (Italy). Dipt. di Chimica Fisica

Vinyl chloride, produced on a large scale in the industry, is an atmospheric pollutant, and because of its importance in the photochemical processes, extensive laboratory measurements of high-resolution infrared spectra are needed. Here, the gas-phase infrared spectrum of monoisotopic CH = CH[sup 37]Cl (isotopic purity, 95%) has been recorded in the [nu][sub 6] band region between 1,263 and 1,297 cm[sup [minus]1], at Doppler-limited resolution, employing a tunable diode laser spectrometer. This vibration of symmetry species A[prime] yields an a/b hybrid band with a prevalent contribution of the a-type component. The rovibrational analysis in the P, Q, and R branches led to the assignment of about 1,400 lines with J [le] 48 and K[sub a] [le] 16. A number of K[sub a] subbands were found to be affected by Coriolis-type resonance, and the [nu][sub 9] + [nu][sub 11] level was identified as the perturber. From a simultaneous fit of the present GSCD, together with literature microwave data, a set of ground state constants up to the sextic coefficients has been obtained using Watson's A-reduction Hamiltonian in the I[prime] representation. A least-squares fit of about 1,170 transitions, free of major resonance contribution, provided a set of effective upper-state constants for the [nu][sub 6] band of CH[sub 2] = CH[sup 37]Cl.

• OSTI ID: 7297727
• Journal Information: Journal of Molecular Spectroscopy; (United States), Journal Name: Journal of Molecular Spectroscopy; (United States) Vol. 164:2; ISSN JMOSA3; ISSN 0022-2852
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION
AIR POLLUTION MONITORING
ATMOSPHERIC CHEMISTRY
CHEMISTRY
CHLORINATED ALIPHATIC HYDROCARBONS
DATA
DATA ANALYSIS
ENERGY-LEVEL TRANSITIONS
EXPERIMENTAL DATA
HALOGENATED ALIPHATIC HYDROCARBONS
INFORMATION
INFRARED SPECTRA
MONITORING
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLLUTION
SPECTRA
VINYL CHLORIDE