Nitrous acid: vibrational frequency shifts due to 15N substitution, and the harmonic force field
Deeley, C. M. and Mills, I. (1985) Nitrous acid: vibrational frequency shifts due to 15N substitution, and the harmonic force field. Journal of Molecular Physics, 54 (1). pp. 23-32. ISSN 0026-8976
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To link to this article DOI: 10.1080/00268978500100021
Vibration rotation spectra of HO15 NO and DO15 NO have been measured at a resolution of 0•04 cm-1 to determine the isotopic shifts in the vibrational band origins. These have been used together with recently determined data on the vibrational band origins, Coriolis constants, and centrifugal distorition constants, to determine the harmonic force field of both cis and trans nitrous acid in least squares refinement calculations. The results are discussed in relation to recent ab initio calculations, the inertia defects, and the torsional potential function.