High-Resolution Infrared Spectrum of Vinyl Fluoride at 500 cm-1
The infrared spectrum of vinyl fluoride (CH2=CHF) has been investigated in the region 390-590 cm-1 at room temperature and at a resolution of 0.0016 cm-1 using a Fourier transform spectrometer. The rovibrational analysis of the spectral features allowed us to assign about 11 000 lines (J </= 60) of the nu9 ab-type band centered at 483.0666 cm-1 and more than 700 lines (J </= 40) of the 2nu9 - nu9 ab-type hot band, the bandcenter of which is located at 485.6687 cm-1. The experimental data provided the rotational and centrifugal distortion constants for the vibrational excited states v9 = 1 and 2 employing Watson's A-reduction Hamiltonian in the Ir representation. Moreover, band origins, harmonic frequency, and anharmonicity factor have been obtained from the vibrational analysis of the fundamental and the associated hot band. Copyright 1997Academic Press
Gambi
A
Dipartimento di Scienze e Tecnologie Chimiche, Universita di Udine, Via Cotonificio 108, Udine, I-33100, Italy
De Lorenzi A
Giorgianni
S