๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Absolute rates of the collisional quenching of O(21D2) by CF2Cl2 and CFCl3

โœ Scribed by I.S. Fletcher; D. Husain

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
287 KB
Volume
39
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

โœฆ Synopsis

The first absolute rate measurerr,ents for the collisional quenching of the electronically excited oxygen atom, O(2 ' D2 1, by the atmospherically important fluorocarbons, CF2C12 and CFC13, are reported. O(2 ' D2) was generated by the repetitive pulsed irradiation of 03 in the Hartley-band continuum and monitored photoelectrically in absorption by time-resolved attenuation of atomic resonance radiation at X = 115.2 nm (O(3 ' Dg j -O(2 ' Dz)). The resulting absolute second order rate constants are found to be (4.8 + 0.6) X lo-" and (7.7 ). 0.9) X lo'-*' cm3 molecule-' s-' at 300 K for CFzCl2 and CPC13, respectively. The resulting absolute data are compared with some previous relative rate data obtained from steady photqlysis measurements.

๐Ÿ“œ SIMILAR VOLUMES

Upper limits for the rate constants of t
Upper limits for the rate constants of the reactions CF3O+O3โ†’CF3O2+O2 and CF3O2+O3โ†’CF3O+2O2
โœ M. Matti Maricq; Joseph J. Szente ๐Ÿ“‚ Article ๐Ÿ“… 1993 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 673 KB

Flash photolysis/time-resolved UV absorption measurements of the rate constants for the title reactions are reported over the temperature range 2 lo-253 K. The photolysis of F2/CF,H/03/02/N, gas mixtures reveals that the formation of CF302 and CF,O radicals has no measurable effect on the ozone conc

Measurements of the UV absorption cross
Measurements of the UV absorption cross sections of CF3CCl2O2, CF3CHFO2, CFCl2CH2O2 and CF2ClCH2O2 in the gas phase
โœ A.A. Jemi-Alade; P.D. Lightfoot; R. Lesclaux ๐Ÿ“‚ Article ๐Ÿ“… 1991 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 525 KB

The absolute UV absorption cross sections of CF3CC1202, CFJCHF02, CFC12CH202, and CFZCICH20, have been measured in the gas phase at 298 K in the range 200-290 nm using the flash-photolysis technique. CF,COCl has been identified as a product in the system involving the self-reaction of CF$C1202.

Kinetics of the reactions of halogenated
Kinetics of the reactions of halogenated methyl radicals (CF3, CF2Cl, CFCl2, and CCl3) with molecular chlorine
โœ Raimo S. Timonen; John J. Russell; David Gutman ๐Ÿ“‚ Article ๐Ÿ“… 1986 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 570 KB

The kinetics of four gas-phase reactions involving halogenated methyl radicals (R,==CF,, CF2C1, CFCI,, and eel,) with molecular chlorine have been studied using a tuhular reactor coupled to a photoionization mass spectrometer. The radicals were homogeneously generated by the pulsed photolysis of pre