Journal of Molecular Structure p. 197 - 208 (2000)
Update date:2022-08-31
Topics:
Baldacci
Baldan
Gambi
Stoppa
The infrared gas-phase spectra of bromofluoromethane (CH2BrF) have been studied in the region below 6200 cm-1 under conditions of medium resolution. All the fundamentals and many overtones, combination and hot bands have been assigned leading to an almost complete set of anharmonicity constants. Rotational analyses have been performed on the observed Q-branch features of over 10 bands. Enriched 79Br and 81Br samples were also employed to confirm vibrational assignment and supply further data. Analyses of Fermi resonance are made. The molecular structure was calculated ab initio at the Hartree-Fock (HF), the second-order Moller-Plesset (MP2) and the density functional theory (DFT) level with the 6M311++G(3df, 2pd) basis set. The ab initio force constants obtained from the vibrational analysis at B3LYP/6-311++G(3df, 2pd) level of theory were employed to fit the experimental data and an optimal harmonic force field was obtained for the CH2BrF molecule. (C) 2000 Elsevier Science B.V.
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