THE SUBMILLIMETER-WAVE SPECTRUM OF PROPIONITRILE $(C_{2}H_{5}CN)$

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1994

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Ohio State University

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The ground state rotational spectrum of propionitrile was observed in the 259 - 610 GHz frequency range. A total of 952 transitions including 732 newly measured ones through J = 70 and $K_{a} = 36$ were fit to a Watson A-reduced Hamiltonian with a root-mean-square deviation of 61 kHz. The fit determined the rotational constants A, B and C along with a complete set of quartic and sextic distortion constants and six octic distortion constants. No splittings due to internal rotation or $^{14} N$ quadrupole were observed. The refinement of the constants should have improved predictive power over the previous $analysis^{1}$, especially at high J values.

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$^{1}$F.J. Lovas, {J. Phys. Chem. Ref. Data.} \textbf{11}, 251 (1982).
Author Institution: Department of Physics, The Ohio State University; Department of Physics, University of New Brunswick, Fredericton

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