High resolution FTIR spectroscopy on CH₂DI and CHD₂I: analyses of the fundamental bands ν_6' and ν_6''

FTIR study of 11 interacting vibrational states of CH2DI

“…Previous study [4] has shown that 6 1 (A 0 ) and 6 1 (A 00 ) vibrational levels located 150 cm À1 apart interact noticeably. From this it could be assumed that vibrational states separated by energy less than 150 cm À1 perturb each other and that any combination states which differ in the values of vibrational quantum numbers like 6 1 (A 0 ) and 6 1 (A 00 ) states had to be considered as interacting.…”

“…Low-resolution IR spectra have been obtained by Riter and Eggers [5] (and some earlier references therein) where all nine fundamental bands have been assigned. High resolution spectra prior to works [3,4] where observed only in two studies. Das et al reported a Doppler-limited diode laser study of part of the m 6 (A 00 ) band [6], and Man and Butcher have recorded and analysed the 2m 3 (A 0 ) and m 6 (A 00 ) bands measured by FTIR spectrometer at a resolution of about 0.05 cm À1 [7].…”

“…To date, the lower m 3 (A 0 ) [3], m 6 (A 0 ) and m 6 (A 00 ) [4] bands of these deuterated varieties have been analyzed. A goal of the present paper is to record and analyse FTIR spectra of the three next fundamental bands m 2 (A 0 ), m 5 (A 0 ), and m 5 (A 00 ) of mono deuterated methyl iodide CH 2 DI which are located in the energy range 1100-1500 cm À1 .…”

Microwave and submillimeterwave spectra of CH2DI and CHD2I

“…[29,30]. Briefly, the m 3 and m 6 bands of both isotopologues were measured with the Bruker IFS 120 HR Fourier spectrometer in Oulu.…”

“…The high resolution infrared spectra of the m 6 and 2m 3 [28] bands of CH 2 DI have also been analyzed. The m 3 [29] and m 6 [30] bands of CHD 2 I and CHD 2 I were also measured by Fourier transform spectroscopy and the ground state rotational constants have been determined using ground state combination differences [29,30]. The m 1 band at 3 lm was measured using a difference frequency laser spectrometer [31].…”