55130-03-5Relevant articles and documents
Rate constants and branching fractions for xenon halide formation from Xe(3P2) and Xe(3P1) reactions
Lin, Daimay,Yu, Y. C.,Setser, D. W.
, p. 5830 - 5832 (1984)
The rate constants for XeF(B,C ), XeCl(B,C ), and XeI(B,C ) formation from reactions of Xe(3P1) and Xe(3P2) with NF3, NZF4, NF2, CCl4, and CF3I have been measured relative to XeCl(B,C ) formation from the reacti
Xe(3P2)+HCL(v=1): Vibrational enhancement of XeCl* formation
Chang, R. S. F.
, p. 2943 - 2948 (1982)
Formation of XeCl* from the Xe+(3P2)+HCl is slightly endothermic.In this work laser excitation of HCl (υ=1) in the presence of Xe(3P2 produuced in a flowing afterglow apparatus allows direct observation of XeCl* fluorescence from the Xe(3P2)+HCl(υ=1) reaction.The formation rate constant is determined to have a lower limit of 2*10-10 cm3 s-1.
Energy disposal in the two-photon laser-assisted reaction in xenon and chlorine gas mixtures
Kohel,Keto
, p. 10551 - 10559 (2000)
The two-photon laser assisted reaction in a low pressure xenon and chlorine gas mixtures is studied to characterize the role of the entrance channel in determining the vibrational state distribution. A high degree of vibrational excitation in the XeCl product is measured. The measurements are in contrast with the vibrationally cold excimer observed following laser excitation in molecular beam experiments. The mean vibrational energy in the XeCl excimer depends upon the laser wavelength. As the laser is tuned toward shorter wavelength, an increasing fraction of the available energy from the reaction is observed.
Reactive quenching of two-photon excited xenon atoms by Cl2
Bruce, M. R.,Layne, W. B.,Meyer, Enno,Keto, J. W.
, p. 420 - 427 (1990)
Total binary and tertiary quench rates have been measured for the reaction Xe (5p5np, np', n = 6,7) + Cl2 at thermal temperatures.Xenon atoms are excited by state-selective, two-photon absorption with an ultraviolet laser.The time-dependent fluorescence from the excited atom in the infrared, visible, and from XeCl* (B) product near 308 nm have been measured with subnanosecond time resolution.The decay rates are measured as a function of Cl2 pressure to 20 Torr and Xe pressure to 400 Torr.The measured reaction rates (k2 ca. 10-9 cm3 s-1) are consistent with a harpoon model described in a separate paper.We also measure large termolecular reaction rates for collisions with xenon atoms (k3 ca. 10-28 cm6 s-1).Total product fluorescence has been examined using a gated optical multichannel analyzer.We measure unit branching fractions for high vibrational levels of XeCl* (B) with very little C state fluorescence observed.
Jouvet, C.,Lardeux-Dedonder, C.,Solgadi, D.
, p. 569 - 572 (1989)
Johnson, Keith,Pease, Roland,Simons, John P.,Smith, Peter A.,Kvaran, Agust
, (1986)
XeF* and XeCl* Formation in Low-Pressure Tesla Coil Discharges
Wren, D. J.,Setser, D. W.,Ku, J. K.
, p. 284 - 291 (1982)
The XeCl* and XeF* emission spectra have been studied from mixtures of Xe with HCl, Cl2, CCl4, NF3, BF3, C2F6, and SF6 in a tesla-coil-driven discharge.The XeX* emission spectra were recorded at pressures below 0.75 torr for all reagents except BF3, and C2F6, which did not give XeF* emission.Low-pressure pulsed dc discharge experiments in Xe/Cl2 and Xe/HCl mixtures gave XeCl* emission spectra very similar to those observed from the tesla-driven discharge.Computer simulations of the XeCl(B-X) spectra from discharges of Xe with Cl2, CCl4, and HCl provide an estimate for the XeCl(B) vibrational distributions.Since Xe(3P2) and Xe(3P1) reacting with HCl and SF6 do not give XeX*, the observation of XeX* from these two reagents requires the reactions of Xe Rydberg states or recombination of Xe+ and Cl- or F- ions.Arguments based upon XeCl* and XeF* vibrational and electronic state populations and the time dependence of the emission suggest that Rydberg state reactions are the dominant mechanism contributing to the XeX* excitation from the low-pressure discharge of Xe/HCl and Xe/SF6 mixtures.
Decay kinetics of XeCl (B,C) in Xe and in mixtures of Xe with Kr, Ar, Ne, and He
Quinones, E.,Yu, Y. C.,Setser, D. W.,Lo, G.
, p. 333 - 344 (1990)
The two-photon, laser-assisted reaction between Xe and Cl2 has been used to prepare XeCl (B,C) molecules in Xe and in Xe mixtures with lighter rare gases for kinetic studies of the coupled XeCl (B,C) states.The XeCl (B-X) spectra were used to assign the conditions for which the vibrational temperature was nearly 300 K.Relative intensity and coupled radiative lifetime measurements provide independent data which support an energy separation between the XeCl (B) and XeCl (C) states of ca. 100 cm-1.The two-body quenching rate constant in Xe for XeCl (B,C) was measuredas 5+3-2x10-12 cm3 s-1, and a three-body quenching rate constant of 13 +/- 4x10-31 cm6 s-1 is indicated.Experiments also were done with added Kr, Ar, Ne, and He to establish two-body and mixed (e.g., Xe + Ar) three-body quenching rate constants.The three-body quenching rate constants are nearly equal to the Xe2Cl* formation rate constants and three-body dark quenching of XeCl (B,C) is negligible.
Infrared Chemiluminescence Studies of the H + NFCl2 and H + NFCl Reactions
Arunan, E.,Liu, C. P.,Setser, D. W.,Gilbert, J. V.,Coombe, R. D.
, p. 494 - 501 (2007/10/02)
The primary and secondary reactions in the H + NFCl2 system have been studied by infrared chemiluminescence in a fast flow reactor at 300 K.The primary reaction is exclusively Cl atom abstraction to give HCl(ν=0-4) + NFCl with a total rate constant of (1.9 +/- 0.4) X 10-11 cm3 molecule-1 s-1 and an inverted vibrational distribution of Ρo-Ρ4 = 9:20:32:27:12.The rate constant for HF formation from H + NFCl was estimated as (0.9 +/- 0.4) X 10-11 cm3 molecule-1 s-1, and the HF vibrational distribution, Ρo-Ρ3 = 42:34:18:6, is characteristic of unimolecular HF elimination reactions.These data for the HF + NCl(a) product channel from the H + NFCl reaction are compared to earlier studies, which provided information about the HCl + NF(a) product channel.The latter seems to be the more important, and the total rate constant for H + NFCl is about 4 X 10-11 cm3 molecule-1 s-1 at 300 K.The dynamics of the H + NFCl reaction are discussed and compared to the H + NF2 reaction.A small number of experiments also were done with the H + NF2Cl reaction system.
