Infrared spectra of CO[sub 2]--H[sub 2] complexes

  1. Get@NRC: Infrared spectra of CO[sub 2]--H[sub 2] complexes (Opens in a new window)
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Journal titleThe Journal Of Chemical Physics
Pages1743136; # of pages: 174308
Subjectbond lengths; carbon compounds; hydrogen neutral molecules; infrared spectra; isotope effects; isotopes; molecular configurations; molecule-photon collisions; red shift; rotational states; vibrational states
AbstractInfrared spectra of weakly bound CO2�H2 complexes have been studied in the region of the CO2 v3 asymmetric stretch, using a tunable diode laser probe and a pulsed supersonic jet expansion. For CO2�paraH2, results were obtained for three isotopic species, 12C16O2, 13C16O2, and 12C18O2. These spectra were analyzed using an asymmetric rotor Hamiltonian, with results that resembled those obtained previously for OCS� and N2O�paraH2, except that half the rotational levels were missing due to the symmetry of CO2 and the spin statistics of the 16O or 18O nuclei. However, for CO2�orthoH2, more complicated spectra were observed which could not be assigned, in contrast with OCS� and N2O�H2 where the paraH2 and orthoH2 spectra were similar, though distinct. The CO2�paraH2 complex has a T-shaped structure with and intermolecular distance of about 3.5 �, and the CO2 v3 vibration exhibits a small redshift (�0.20 cm�1) in the complex.
Publication date
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NPARC number12339083
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Record identifier10ff9e0f-93a0-4284-8213-cfdd2a691797
Record created2009-09-11
Record modified2016-05-09
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