Infrared spectra of ethylene clusters: (C2D4)2 and (C2D4)3

  1. Get@NRC: Infrared spectra of ethylene clusters: (C2D4)2 and (C2D4)3 (Opens in a new window)
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Journal titlePhysical Chemistry Chemical Physics
AbstractSpectra of ethylene dimers and trimers 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 dimer spectrum is that of a prolate symmetric top perpendicular band, with a distinctive appearance because the A rotational constant is almost exactly equal to six times the B constant. The analysis supports the previously determined cross-shaped dimer structure with D2d symmetry. An ethylene trimer has not previously been observed with rotational resolution. The spectrum is that of an oblate symmetric top parallel band. It leads to a proposed trimer structure which is barrel shaped and has C3h or C3 symmetry, with the ethylene monomer C–C axes approximately aligned along the trimer symmetry axis.
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AffiliationNRC Steacie Institute for Molecular Sciences; National Research Council Canada
Peer reviewedYes
NPARC number21268936
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Record identifierb13d54a0-83ad-4930-9460-7760781d61c3
Record created2013-11-27
Record modified2016-05-09
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