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

Physical Chemistry Chemical Physics : PCCP
M RezaeiN Moazzen-Ahmadi

Abstract

Spectra of ethylene dimers and trimers are studied in the ν(11) fundamental band region of C(2)D(4) (≈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 D(2d) 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 C(3h) or C(3) symmetry, with the ethylene monomer C-C axes approximately aligned along the trimer symmetry axis.

References

Jul 13, 2006·The Journal of Physical Chemistry. a·Jukka-Pekka JalkanenRichard L Rowley
May 5, 2007·The Journal of Chemical Physics·M DehghaniA R W McKellar
Mar 14, 2008·Physical Chemistry Chemical Physics : PCCP·M DehghanyA R W McKellar
Nov 22, 2011·Journal of Computational Chemistry·Yulia N KaluginaVincent Boudon

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Citations

Jul 5, 2012·The Review of Scientific Instruments·M Dehghany, K H Michaelian
Jan 8, 2020·The Journal of Physical Chemistry. a·A R W McKellar, N Moazzen-Ahmadi

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