Infrared spectra of the NeC₂D₄ and ArC₂D₄ complexes

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DOIResolve DOI: http://doi.org/10.1016/j.jms.2013.05.013
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TypeArticle
Journal titleJournal of Molecular Spectroscopy
ISSN0022-2852
Volume289
Pages2125
SubjectEthylene; Argon; Neon; Infrared spectrum; Dimer; van der Waals; Supersonic jet
AbstractSpectra of Ne─C₂D₄ and Ar─C₂D₄ are studied in the ν11 fundamental band region of C₂D₄ (≈2200 cm⁻¹) using a tuneable quantum cascade laser to probe a pulsed supersonic slit jet expansion. The spectra are those of perpendicular bands of near-prolate asymmetric rotors, but with a doubling of transitions due to tunneling. These tunneling splittings are due to hindered internal rotation of C₂D₄ around its C─C axis, and are more prominent for Ne─C₂D₄ than for Ar─C₂D₄. The analysis yields the first direct measurement of the A rotational constants for these complexes, and shows that the vibrational shifts are very small (<0.3 cm⁻¹). Attempts to observe the spectrum of He─C₂D₄ were not successful.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationSecurity and Disruptive Technologies; National Research Council Canada
Peer reviewedYes
IdentifierS0022285213000854
NPARC number23000548
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Record identifier4c4013d8-bc29-4e8b-bc55-fddbbcfd7964
Record created2016-07-29
Record modified2016-07-29
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