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The far infrared spectrum of trans-formic acid: An extension up to 175 cm-1

par Predoi-Cross, Adriana;Herman, Michel ;Fusina, Luciano;Di Lonardo, Gianfranco
Référence Journal of quantitative spectroscopy & radiative transfer, 113, page (1134-1137)
Publication Publié, 2012

Article révisé par les pairs

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Résumé :

The far infrared spectrum of HCOOH was recorded at a high resolution (0.0009cm -1) and long path length (72m) at the far-infrared beamline, Canadian Light Source. Spectra were recorded in the region 62-300cm -1, showing transitions from the trans-isomer.Ground state rotational transitions with K a up to 30, were identified up to 175cm -1, extending the observation reported in the literature. A total of 3321 transitions were assigned and fitted together with previous (4149) published data. An improved set of rotational parameters was obtained adopting the symmetric top (A) reduction of the rotational Hamiltonian in the I r representation. The newly measured far infrared transitions allowed the determination of all diagonal and off diagonal 8th order parameters L and of some of the diagonal 10th order parameters P. © 2012 Elsevier Ltd.