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 α^A and α^B constants, values of α₃^A = 28.6(3) × 10^-6 cm^-1 and α₃^B = 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. © 1989.

Export Date: 26 August 2010Source: Scopus