Intramolecular kinetic isotope effect in the reaction of fluorine atoms with methane-d2 (CH2D2)

Avigdor Persky

doi:10.1063/1.1680806

Intramolecular kinetic isotope effect in the reaction of fluorine atoms with methane-d₂ (CH₂D₂)

Avigdor Persky

Weizmann Institute of Science

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The relative rates of the two competing isotopic reactions: F + CH ₂D₂ → HF + CHD₂ and F + CH ₂D₂ → DF + CH₂D, were measured in a fast flow system by direct mass spectrometric analysis of the reaction products in the temperature range of 159° to 298°K. The ratio of rates can be expressed as an Arrhenius type equation: k_F+HCHDk _F+DCH2_D = (0-81 ±0.03) exp[(275 ± 15)/R T]. The relation between the intramolecular isotope effect F+HCHD/F+DCHJD and the intermolecular isotope effect k_F+CH2k _F+CD4 is discussed with regard to secondary isotope effects in the fluorine atom + methane reaction.

Original language	English
Pages (from-to)	49-52
Number of pages	4
Journal	Journal of Chemical Physics
Volume	60
Issue number	1
DOIs	https://doi.org/10.1063/1.1680806
State	Published - 1974
Externally published	Yes

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title = "Intramolecular kinetic isotope effect in the reaction of fluorine atoms with methane-d2 (CH2D2)",

abstract = "The relative rates of the two competing isotopic reactions: F + CH 2D2 → HF + CHD2 and F + CH 2D2 → DF + CH2D, were measured in a fast flow system by direct mass spectrometric analysis of the reaction products in the temperature range of 159° to 298°K. The ratio of rates can be expressed as an Arrhenius type equation: kF+HCHDk F+DCH2D = (0-81 ±0.03) exp[(275 ± 15)/R T]. The relation between the intramolecular isotope effect F+HCHD/F+DCHJD and the intermolecular isotope effect kF+CH2k F+CD4 is discussed with regard to secondary isotope effects in the fluorine atom + methane reaction.",

author = "Avigdor Persky",

year = "1974",

doi = "10.1063/1.1680806",

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N2 - The relative rates of the two competing isotopic reactions: F + CH 2D2 → HF + CHD2 and F + CH 2D2 → DF + CH2D, were measured in a fast flow system by direct mass spectrometric analysis of the reaction products in the temperature range of 159° to 298°K. The ratio of rates can be expressed as an Arrhenius type equation: kF+HCHDk F+DCH2D = (0-81 ±0.03) exp[(275 ± 15)/R T]. The relation between the intramolecular isotope effect F+HCHD/F+DCHJD and the intermolecular isotope effect kF+CH2k F+CD4 is discussed with regard to secondary isotope effects in the fluorine atom + methane reaction.

AB - The relative rates of the two competing isotopic reactions: F + CH 2D2 → HF + CHD2 and F + CH 2D2 → DF + CH2D, were measured in a fast flow system by direct mass spectrometric analysis of the reaction products in the temperature range of 159° to 298°K. The ratio of rates can be expressed as an Arrhenius type equation: kF+HCHDk F+DCH2D = (0-81 ±0.03) exp[(275 ± 15)/R T]. The relation between the intramolecular isotope effect F+HCHD/F+DCHJD and the intermolecular isotope effect kF+CH2k F+CD4 is discussed with regard to secondary isotope effects in the fluorine atom + methane reaction.

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Intramolecular kinetic isotope effect in the reaction of fluorine atoms with methane-d₂ (CH₂D₂)

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