High-resolution infrared spectrum and analysis of the 2ν3 band of CF3Cl

• Published in: Journal of molecular spectroscopy Vol. 135; no. 1; pp. 131 - 143
• Main Authors: Nencini, L., Snels, M.
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 01.05.1989; Elsevier
• Subjects: Atomic and molecular physics; Exact sciences and technology; Molecular properties and interactions with photons; Physics; Properties of molecules and molecular ions; Rotation, vibration and vibration-rotation constants; Hot band; Rotational constant; Centrifugal distortion constant; Experimental study; Rotational analysis; Rovibrational transition; Saturated aliphatic compound; Gaseous state; Molecular constant; Infrared spectrum; N harmonic; Halogen Organic compounds; Semiconductor laser
• ISSN: 0022-2852; 1096-083X
• DOI: 10.1016/0022-2852(89)90360-3

The 2ν3 band of CF3Cl and several hot bands of the most abundant isotope, CF335Cl, have been investigated using a tunable diode laser spectrometer. The K fine structure of the 2ν3 fundamental of the CF335Cl isotopic species has been measured for about 50 multiplets from P(70) up to R(101). Accurate molecular constants for the 2ν3 band were obtained from a least-squares fit of more than 1000 P(J, K) and R(J, K) transitions (K ≤ 48). Assuming additivity for αA and αB constants, values of α3A = 28.6(3) × 10−6 cm−1 and α3B = 70.34(4) × 10−6 cm−1 were calculated. Many unresolved P(J) and R(J) multiplets were observed and assigned to the 2ν3 fundamental of the CF337Cl isotopic variety and to the hot bands 2ν3 + ν6 − ν6, 2ν3 + ν5 − ν5, and 3ν3 - ν3 of the most abundant CF335Cl.