One- and two-dimensional Fourier transform spectroscopy in the microwave and radiofrequency range of trifluoromethane in the vibrational state ν 6 = 1

Abstract

For trifluoromethane, CF 3H, A 1-A 2 splittings with K = | k- l| = 3 in the degenerate vibrational state ν 6 = 1 have been determined using two-dimensional radiofrequency-microwave double resonance Fourier transform spectroscopy. The observation of direct l-type resonance transitions with K = 3 has been extended to lower J values by means of microwave Fourier transform spectroscopy. The analysis yielded improved values for the rotational constant C 6, for the Δ l= 0, Δ k= ± 6 interaction constant w 6 and enabled the determination of a J dependence of the Δ l= ± 2, Δ k= ∓ 4 t-type interaction constant.