Gas Phase Reactions of Fluorine Atoms

Abstract

The rate of reaction of F atoms with a series of compounds, CH4, CH3F, CH2F2, CHF3, CHClF2, HCl, CBrF3, NH3, and PH3 has been determined relative to the chemiluminescent reaction[Formula: see text]by photometry. The fluorine atoms were produced in a flow system from the fluid mixing of molecular fluorine and nitric oxide diluted with argon.

Ab initio direct dynamics studies on the hydrogen abstraction reactions of CF2H2 and CF3H with F atom

“…Most of the determined rate constants show good mutual agreement with a deviation of about 1.2. However, they are significantly lower than the values of 1.83 Â 10 À11 and (9.8 ± 3.2) Â 10 À12 cm 3 molecule À1 s À1 given by Pollock et al [8] and Nielsen et al [6], respectively. The kinetic studies of reaction CF 3 H + F ?…”

“…The experimental rate constants for the reaction of CF 2 H 2 + F ? HF + CF 2 H (R1) were measured around room temperature [4][5][6][7][8] and in the temperature range of 182-298 K [9]. Most of the determined rate constants show good mutual agreement with a deviation of about 1.2.…”

“…HF + CF 3 (R2) were investigated more extensively. The rate constants around 298 K [4,5,8,11] and in the temperature ranges of 298-398 K [12], 210-353 K [10], and 301-667 K [13] were reported. The agreement among these experimental results is good.…”

Primary products of the elementary reactions of CH2CO with F, Cl, and OH in the gas phase

“…Reaction (6) produces exclusively CH2F with a rate constant of k6 = 5.3-1Ol3 cm3/mol.s [26]. Reaction (6) produces exclusively CH2F with a rate constant of k6 = 5.3-1Ol3 cm3/mol.s [26].…”

Spectroscopy and photochemistry of free radicals formed by the reaction of F atoms with small molecules

“…In a survey of the ultraviolet chemiluminescence of free radicals produced in F-atom reaction systems, Schatz and Kaufman [14] reported observation of the OH A-X emission in'the F + H20 reaction, of the NH A-X emission in the F + NH 3 reaction, and of the emissions of such species as CH, C 2, CF, and CF 2 on reaction of F atoms with hydrocarbons. The emission from electronically excited FNO has been used by Pollock and Jones [15] to study the rate of reaction of F atoms with other compounds relative to that with NO.…”