6533b7d6fe1ef96bd126642e
RESEARCH PRODUCT
New measurements and global analysis of chloromethane in the region from 0 to 1800cm−1
Jean-paul ChampionJ.-m. ColmontL. FéjardAndrei NikitinB. BakriM LitzH. Bürgersubject
PhysicsChloromethaneFourier transform spectraAtomic and Molecular Physics and OpticsHot bandStandard deviationIsotopomerssymbols.namesakeDipolechemistry.chemical_compoundNuclear magnetic resonancechemistrysymbolsMoleculePhysical and Theoretical ChemistryAtomic physicsHamiltonian (quantum mechanics)Spectroscopydescription
Abstract New high resolution Fourier transform spectra of pure 12CH335Cl and 12CH337Cl isotopomers of chloromethane have been recorded in Wuppertal covering the region from 600 to 3800 cm−1. New rotational transitions within the v2=1, v5=1, and v3=2 states have been measured at Lille. A first global analysis of the lower four band systems of the molecule (700–1800 cm−1) is reported. The model was based on an effective Hamiltonian and dipole moment expressed in terms of irreducible tensor operators. A common set of 125 effective hamiltonian parameters (sixth order) has been adjusted to fit simultaneously some 11 000 IR data for each of the isotopomers including 153 mm wave data for 12 CH3 35 Cl. The assignments involve 12 sets of transitions (6 cold bands, 3 hot bands, and 3 pure rotational systems for 12CH335Cl). The standard deviation was on average 0.00014 cm−1 and 175 kHz for the IR and MMW data, respectively. The v3=v6=1 state was analysed for the first time principally from observed hot band transitions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-10-01 | Journal of Molecular Spectroscopy |