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The High-Resolution Fourier Transform Infrared Spectrum of Isocyanogen, CNCN: Rovibrational Analysis of the ν4, ν5, and ν4+ ν5Band Systems and the Fermi Dyad ν3and 2ν4

Authors
Journal
Journal of Molecular Spectroscopy
0022-2852
Publisher
Elsevier
Publication Date
Volume
162
Issue
2
Identifiers
DOI: 10.1006/jmsp.1993.1296
Disciplines
  • Physics

Abstract

Abstract The high-resolution gas-phase Fourier transform infrared spectrum of the linear molecule isocyanogen, CNCN, has been measured between 150 and 1300 cm −1 with an unapodized resolution of 0.0018 cm −1. The band systems due to the excitation of the cis and trans bending modes ν 5 and ν 4 around 194.8 and 463.5 cm −1, respectively, have been analyzed. Additionally the combination band system ν 5 and ν 4 around 659.0 cm −1 and the transitions to the Fermi resonance pair ν 3 and 2ν 4 around 875 and 975 cm −1, respectively, were analyzed. Furthermore, two components of the related Fermi triad could be assigned. Constants of a power series in J( J + 1) for the numerous subbands as well as constants of an effective Hamiltonian (K. M. T. Yamada, F. W. Birss, and M. R. Aliev, J. Mol. Spectrosc. 112, 347-356, 1985) are presented.

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