The perpendicular fundamental v5 of chloroform 12CH35Cl3: high resolution infrared study of the v5 band together with the millimetre-wave rotational spectrum |
| |
Authors: | JARI PIETILÁ VELI-MATTI HORNEMAN RAUNO ANTTILA BERNARD LEMOINE FABRICE RAYNAUD JEAN-MARCEL COLMONT |
| |
Institution: | 1. Department of Physical Sciences , University of Oulu , POB 3000, FIN-90401 , Oulu , Finland;2. Laboratoire de Physique des Lasers, Atomes et Moleculés, UMR CNRS 8523 , Universit de Lille 1 , F-59655 , Villeneuve d'Ascq Cedex , France |
| |
Abstract: | The infrared spectrum of the perpendicular fundamental v5 of chloroform around 776 cm?1 has been studied by applying two high resolution methods. A short range from the central part of the spectrum was measured with a diode laser by using a cold jet sample including chloroform in natural isotopic abundancies. More than 100 rotational lines of 12CH35Cl3 could be assigned. The whole band region was measured by a Fourier transform spectrometer at a resolution of 0.0010cm?1. In this case an isotopically pure sample of 12CH35Cl3 was used. Starting from the results of the diode laser investigation more than 2000 lines could be assigned with Jmax = 91 and Kmax = 58. In addition to the infrared spectra, millimetre-wave lines also were measured. A total of 58 lines corresponding to J values 22, 23 and 35 at the excited vibration state v5 = 1 were assigned and analysed. All the data from three different spectra were simultaneously fitted and, for example, the results v0 = 775.961 50(3) cm?1, 98, B5-B0 = ?0.180171(22) × 10?3cm?1, C5 ? C0 = ?0.170 57(15) × 10?3cm?1, and (Cζ)5 = 0.047 5294(11) cm?1 were obtained. |
| |
Keywords: | |
|
|