High resolution measurements of14N, D quadrupole coupling in CH3CN and CD3CN

Stephen G Kukolich, D. J. Ruben, J. H S Wang, J. R. Williams

Research output: Contribution to journalArticle

39 Scopus citations


A molecular beam maser spectrometer was used to measure hyperfine structure on the J = 1→0 rotational transitions in CH3CN and CD 3CN. Measured nitrogen quadrupole coupling strengths are eq aaQ(N)=-4224.4± 1.5 kHz for CH3CN and eq aaQ(N)=-4229.3± kHz for CD3CN. The deuterium quadrupole coupling strength along the C-D bond direction is eq zzQ(D)= 167.5±4.0 kHz. Nitrogen quadrupole coupling is discussed in relation to the electronic structure. Spin-rotation interaction strengths are reported. A convenient method for calculating matrix elements for hyperfine interactions in an arbitrary coupling scheme is presented.

Original languageEnglish (US)
Pages (from-to)3155-3159
Number of pages5
JournalThe Journal of Chemical Physics
Publication statusPublished - 1973
Externally publishedYes


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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