Shock wave study of the UV spectrum of CF3I

Vibrational relaxation and dissociation in the perfluoromethyl halides, CF3Cl, CF3Br, andCF3I

“…al. (4) on CF 3 Br (1100 -1600 K, 1.5 -2.6 atm), and of Brouwer and Troe, et al [6] on CF 3 I, (1050 -1300 K, 1.6 -1.8 atm) are compared. (CF 3 Cl rates are compared in ref.…”

Falloff curves and mechanism of thermal decomposition of CF3I in shock waves

“…While the ARAS experiments used reactant concentrations as low as 1-4 ppm of CF 3 I in Ar 15 (or in Kr 13 ), the present work employs mixtures with 100-1500 ppm (mostly about 500 ppm). The present experiments were able to monitor CF 3 I concentrations with considerably reduced reactant concentrations in comparison to earlier shock tube work (employing reactant concentrations of 0.5-5% 6,9,14 ). Within the present range of reactant concentrations, the onset of secondary reactions can be monitored.…”

“…[1][2][3] On the other hand, with its weak C-I bond in the presence of strong C-F bonds, it represents a prototype of a unimolecular dissociation reaction of simple bond-fission character. [4][5][6][7][8][9][10][11][12][13][14][15] Furthermore, its secondary reactions are related to processes of importance in chemical lasers and laser-induced isotope separation. 16,17 The role of secondary reactions, in flow system studies of CF 3 I dissociation up to about 800 K, remained unclear for quite some while.…”

Spin-orbit coupling and dissociation of CO2 molecules

“…As is known, the СО 2 molecule in the ground electronic state has three vibrational modes, including deforma tion mode ν 2 , which is doubly degenerate and is in the Fermi resonance with symmetric stretching mode ν 1 . The absorption spectra in this case are successfully described by using the quasi diatomic approximation [22][23][24], which is based on the assumption that, among a large number of the excited states of the mol ecule, the largest contribution to the absorption is made by the transitions between the states of mainly the same type of vibrations. In [25], it was shown that dissociation of CO 2 molecules occurs from the excited vibrational states of the antisymmetric mode ν 3 .…”