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High-Resolution Infrared and Microwave Study of the n20 and n21 Levels near 300 cm-1 in 1,2,4-Triazine.

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Author

  • F Hegelund
  • René Wugt Larsen
  • Bengt Nelander
  • D. Christen
  • M.H. Palmer

Summary, in English

The gas phase far-IR spectrum of the small nu, Greek20 (A″, 367.88 cm−1) and small nu, Greek21 (A″, 311.28 cm−1) bands of 1,2,4-triazine, a five membered ring having the point group Cs, has been studied at a resolution ranging from 0.002 to 0.003 cm−1. From the MW spectrum 58 transitions in the small nu, Greek20 level and 64 in the small nu, Greek21 level have been assigned. The small nu, Greek20 and small nu, Greek21 modes which are due to non-planar motions of the ring system are found to be nearly unperturbed. From a simultaneous analysis of IR and MW transitions band centers, rotational constants, and the quartic centrifugal distortion constants ΔJ, ΔJK, ΔK, small delta, GreekJ, and small delta, GreekK have been obtained using the Watson Hamiltonian, A-reduction, IIIr-representation.

Publishing year

2003

Language

English

Pages

9-18

Publication/Series

Journal of Molecular Spectroscopy

Volume

217

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • 1
  • 2
  • 4-Triazine
  • Infrared
  • Microwave
  • Rotational constants

Status

Published

ISBN/ISSN/Other

  • ISSN: 0022-2852