Kinetics and mechanism of the reaction of fluorine atoms with trifluoroacetic acid

Vasiliev, E. S.; Knyazev, Vadim D.; Savelieva, Ekaterina S.; Morozov, I. I.

doi:10.1016/j.cplett.2011.07.023

Cited by 10 publications

(4 citation statements)

References 28 publications

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“…Reaction with CH 3 CCl 3 has already been used as a competing reaction in our previous study of the reaction of F‐atom with trifluoroacetic acid (TFA):

F + C {normalH}_{3} CC {normall}_{3} \to HF + C {normalH}_{2} CC {normall}_{3} .

…”

Section: Resultsmentioning

confidence: 99%

Rate constant for the reaction of F‐atoms with trichloroacetic acid

Vasiliev

Morozov

Karpov

2019

Int J of Chemical Kinetics

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Kinetics of the reaction of F‐atoms with trichloroacetic acid was studied at 293 K using a low‐pressure flow reactor. Reactant concentrations were monitored by mass spectrometry combined with molecular beam sampling. The reaction rate constant obtained was k = (4.3 ± 0.8) × 10−11 cm3 molecule−1 s−1. This is an average value determined by the relative method employing four reference reactions of F‐atoms: with 1,1,1‐trichloroethane, ethanol, cyclohexane, and 2‐fluoroethanol, for which rate constant ratios k/kref = 7.4 ± 1.2, 0.24 ± 0.02, 0.28 ± 0.02, and 0.34 ± 0.04, respectively, were obtained. The resultant rate constant is compared with the rate constants for the related fluoro‐substituted acids.

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“…Reaction with CH 3 CCl 3 has already been used as a competing reaction in our previous study of the reaction of F‐atom with trifluoroacetic acid (TFA):

F + C {normalH}_{3} CC {normall}_{3} \to HF + C {normalH}_{2} CC {normall}_{3} .

…”

Section: Resultsmentioning

confidence: 99%

Rate constant for the reaction of F‐atoms with trichloroacetic acid

Vasiliev

Morozov

Karpov

2019

Int J of Chemical Kinetics

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“…A Pyrex tube with the deposited salt sample was introduced into the flow reactor along its axis. The apparatus used in this study has been partly described in. , …”

Section: Methodsmentioning

confidence: 99%

“…The apparatus used in this study has been partly described in. 10,11 Flow-Tube Reactor/Mass Spectrometer. The experimental equipment is shown schematically in Figure 1.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Determination of Uptake Coefficient for ClO Radicals on the Surface of Mineral Salts

et al. 2012

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The uptake of ClO radicals on KBr, NaCl, and NaBr dry solid films was studied at 1 Torr pressure of helium over the temperature range 290-350 K using a flow tube technique with a modulated molecular beam mass spectrometer as the detection method. A Pyrex tube with the deposited salt sample was introduced into the flow reactor along its axis. The ClO uptake coefficient on the KBr surface did not depend on temperature within the experimental accuracy of ∼20%. Chlorine oxide radicals were prepared using the reaction of Cl with ozone. It was found out that the ClO uptake coefficient strongly depended on ozone concentration. The uptake coefficients at T = 293 K and [O(3)] = 4.6 × 10(13) molecules cm(-3) were found to be (9.6 ± 5.7) × 10(-4), (3.7 ± 1.5) × 10(-4), and (12.3 ± 3.6) × 10(-4) for KBr, NaCl, and NaBr, respectively. Bromine-containing species were not observed during the interaction of ClO radicals with KBr film. The results obtained indicate that the ClO loss through heterogeneous interaction with salt surface is not sufficiently rapid to compete with gas-phase self-reaction in the atmosphere.

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“…As is known, it determines their mobility and affects the rate of chemical reactions, including diffusion processes, where the mobility of ions should also be considered together with the hydration shell. The latter also applies to the problem of the passage of incoherent microwave radiation through aerosol layers, where the processes occurring in the aerosols themselves remain especially significant [32][33][34].…”

Section: The Effect Of Atmospheric Aerosols On the Propagation Of Radmentioning

confidence: 99%

The Problems of Passive Remote Sensing of the Earth’s Surface in the Range of 1.2–1.6 GHz

et al. 2020

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The main problems of remote sensing of the Earth’s surface within the frequency range 1.2–1.6 GHz are discussed. They are related to the resonant quantum properties of the radio wave propagation medium in the lower ionosphere. It is shown that, for the passive remote sensing, the main source is incoherent microwave radiation of the D and E ionospheric layers in the decimeter range. For the first time, a theoretically grounded principally new scheme of measurements is suggested. The scheme assumes that the radiation source exists below the satellite orbit and accounts for the fact that two types of radiation (direct and reflected) reach the satellite sensor. The separation of the respective fluxes is a serious problem that should be solved for the correct interpretation of the measurements. The question is raised regarding the correct calibration of measuring equipment, depending on the current state of the ionosphere.

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Kinetics and mechanism of the reaction of fluorine atoms with trifluoroacetic acid

Cited by 10 publications

References 28 publications

Rate constant for the reaction of F‐atoms with trichloroacetic acid

Rate constant for the reaction of F‐atoms with trichloroacetic acid

Determination of Uptake Coefficient for ClO Radicals on the Surface of Mineral Salts

The Problems of Passive Remote Sensing of the Earth’s Surface in the Range of 1.2–1.6 GHz

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