| Autor: |
Nela, Maria, Niskanen, Kirsi, Vaittinen, Olavi, Halonen, Lauri, Bürger, Hans, Polanz, Oliver |
| Předmět: |
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| Zdroj: |
Molecular Physics; 3/10/2002, Vol. 100 Issue 5, p655-665, 11p |
| Abstrakt: |
High-resolution vibration-rotation spectra of monochloroacetylene (HCCCl) have been recorded in two different wavenumber regions. Fourier transform infrared interferometer measurements in the 4000-10 000 cm[sup -1] range have been performed with a resolution of 0.005-0.016 cm[sup -1] and titanium:sapphire ring laser intracavity photoacoustic measurements in the 12 500-12 600 cm[sup -1] and 12 800-12 860 cm[sup -1] regions have been carried out with a Doppler-limited resolution of about 0.02 cm[sup -1]. Altogether, 40 vibrational bands belonging to the HCC[sup 35]Cl and 15 bands belonging to the HCC[sup 37]Cl isotopic species have been rotationally assigned. A vibrational model, based on the conventional rectilinear normal coordinate theory including anharmonic Fermi, Darling-Dennison and vibrational l-type doubling resonances, has been used to attach vibrational labels to the bands. This approach is found to describe well the rovibrational energy level structure at least in the energy range covered in this work. The model shows that the CH oscillator becomes decoupled from the rest of the molecule as vibrational energy increases. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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