Show simple item record

dc.creatorFraser, G. T.en_US
dc.creatorLovas, F. J.en_US
dc.creatorSuenram, R. D.en_US
dc.creatorGillies, J. Z.en_US
dc.creatorGillies, C. W.en_US
dc.date.accessioned2006-06-15T15:03:15Z
dc.date.available2006-06-15T15:03:15Z
dc.date.issued1991en_US
dc.identifier1991-ME-6en_US
dc.identifier.urihttp://hdl.handle.net/1811/12376
dc.descriptionAuthor Institution: Molecular Physics Division, National Institute of Standards and Technology; Department of Chemistry, Siena College; Department of Chemistry, Rensselaer Polytechnic Instituteen_US
dc.description.abstractMicrowave spectra of $C_{2}H_{4}--HCCH, C_{2}H_{4}--DCCH, C_{2}H_{4}--DCCD, D_{2}C=CH_{2}--HCCH$, and trans-HDC=CHD--HCCH have been recorded using a pulsed-nozzle Fourier-transform microwave spectrometer. An a-type, $\bigtriangleup K_{a} = 0$ spectrum is observed, with a number of transitions being split into doublets due to tunneling. For the normal isotopic species we find A = 25981 (33) MHz, B+C = 3478.2560(13) MHz, and B-C = 89.45(18) MHz. The complex is shown to have a $C_{2v}$ structure in which the HCCH unit hydrogen bonds to the ethylene $\pi$ cloud, with the HCCH axis normal to the plane of the ethylene. The hydrogen-bond length is found to be 2.78 {\AA}. Centrifugal-distortion analysis yields a weak-bond stretching force constant of 0.025 mdyn/{\AA}, corresponding to a stretching frequency of 56 $cm^{-1}$. Stark effect measurements determine the electric dipole moment of the complex to be 0.2654(6) D. An infrared spectrum of the asymmetric acetylenic C-H stretch in the complex has also been measured using an color-center laser optothermal spectrometer. The rotational lines are predissociation broadened, preventing the resolution of K structure. The Q-branch for the band overlaps the Q-branch for the equivalent band in the acetylene dimer.en_US
dc.format.extent122062 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleMICROWAVE AND INFRARED SPECTRA OF $C_{2}H_{4}--HCCH$en_US
dc.typearticleen_US


Files in this item

Thumbnail

Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.

This item appears in the following Collection(s)

Show simple item record