The Submillimeter Wave Spectrum of Isotopic Methyl Cyanide

Details The Submillimeter Wave Spectrum of Isotopic Methyl Cyanide The Submillimeter Wave Spectrum of Isotopic Methyl Cyanide

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...471.1067p&link_type=abstract

Astrophysical Journal v.471, p.1067

Astronomy and Astrophysics

Astronomy

9

Line: Identification, Molecular Processes, Ism: Molecules, Methods: Laboratory, Radio Lines: Ism

Scientific paper

The laboratory submillimeter wave rotational spectrum of the 13CH3CN,CH313CN, and CH3C15N isotopomers of methyl cyanide has been observed in natural abundance in the 294 to 607 GHz region. The maximum J and K values are 34 and t4, respectively. Fifteen additional CH3CN transitions up to K = 2t were also measured. The transitions of all four species are fitted to a symmetric top Hamiltonian, and the rotation and distortion constants are determined. The 14N quadrupole and spin rotation coupling constants are also calculated and presented. Suggested values for many other parameters, which could not be directly determined from the isotope spectra, are calculated from the normal species values and isotope relationships. The determined and calculated constants should predict the spectrum of the three isotopomers to well over 1 THz accurately enough for astronomical assignments.

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