Microwave spectrum, structure, and quadrupole coupling for the ethylene-hydrogen cyanide complex

S. G. Kukolich, W. G. Read, P. D. Aldrich

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Microwave spectra for the complexes ethylene-HCN and ethylene-DCN were observed with the pulsed beam, Fourier transform spectrometer. The complexes are "T" shaped with the HCN hydrogen atom adjacent to the C-C double bond of ethylene. The HCN molecule lies on a line perpendicular to the plane of ethylene and passing through the ethylene center of mass. The HCN carbon atom is 3.702(10) Å above the ethylene plane. The nitrogen quadrupole coupling strength is eQqaa(N)=-4.363(2)MHz for ethylene-HCN and Qq aa(N)=-4.396(3) MHz for ethylene-DCN. The deuterium quadrupole coupling strength is eQqaa (D)=0.178(7) MHz for ethylene-DCN. The anisotropy in the nitrogen quadrupole coupling eQ(qbb -qdd)(N) is 0.013(3) MHz for ethylene-HCN and 0.047(12) MHz for ethylene-DCN. The rotational constants are ABC ethylene-HCN 25496(689) 1906.581(5) 1808.878(5) ethylene-DCN 24960(1101)1904.739(6) 1807.344(6) entrifugal distortion constants D1 and D3K were obtained.

Original languageEnglish (US)
Pages (from-to)3552-3556
Number of pages5
JournalThe Journal of chemical physics
Issue number6
StatePublished - 1983

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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