A high-resolution infrared study of the ν4 band of CH3I

Infrared Spectrum of13CH3I in the 2770–3200 cm−1Region: Rotational Analysis of the Fundamentals ν1and ν4Together with 2ν5and ν3+ ν5+ ν6

“…The sum-n 6 system on n 4 is negligible. 6)) are quite similar for both the isotopomers, indicating that also these constants describe the properties of the molecule instead of being just fitting parameters. The absolute value of our l-doubling parameter q 4 is also of the same order of magnitude as is in Ref.…”

“…Matrices are first symmetry factorized teraction is strongest in R Q 7 of n 4 that, as a consequence, into A 1 , A 2 , and E blocks and then diagonalized to get the delivers part of its intensity to the resonating partner n 2 / calculated energies. The observed energies are obtained from 2n 6 , which, as a consequence, appears as one broad line and finally turns down toward lower wavenumbers. The Fermi interaction is strongest in R Q 7 , which then gives intensity to R Q 7 of n 2 / 2n 6 (see text).…”

Difference Frequency Spectroscopy of Methyl Iodide12CHD2I in the Ground and ν1Vibrational States

“…1, it contains much more structure than those due to K A Å 2, 3, 4, 5. Equation [2] implies that, for the K A Å 6 Q branch, the difference between B V and B V Љ is large enough to separate the many transitions due to different values of J. This however is an artificial way of parameterizing the perturbation which, since it is strongly K-dependent, is probably due to a Coriolis resonance.…”

“…The infrared spectrum was subsequently recorded using a the best understood symmetric rotor molecules (1)(2)(3)(4). There is further interest in studying isotopically substituted species prism spectrometer (5) in order to study the vibrational force constants, while investigation of the general harmonic force which do not maintain the C 3£ symmetry of the parent molecule, and we present here a high-resolution spectrum of rota-field was pursued by Russel et al (7) and then by Duncan et al (8).…”

Microwave and submillimeterwave spectra of CH2DI and CHD2I

“…The ground state rotational spectra, all fundamental infrared bands, as well as a few overtone and combination bands, have been thoroughly investigated for CH 3 I [1][2][3][4][5][6][7][8][9][10][11], 13 CH 3 I [12][13][14][15][16], and CD 3 I [17][18][19][20][21][22][23], see Table 1 for a summary. The ground state rotational spectrum, and the m 3 /m 6 and m 2 /m 5 /2m 3 polyads, of 13 CD 3 I have also been analyzed [19,20,24] and preliminary values for the rotational constants of the m 1 and m 4 bands are also available [25].…”