Carbon kinetic isotope effect in the oxidation of methane by hydroxyl
โ Scribed by Fleet Rust; C. M. Stevens
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 319 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0538-8066
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โฆ Synopsis
Abstract
The carbon kinetic isotope effect in the reaction of CH~4~ with OH has an experimentally measured value of 1.003. The measurement was performed using a static system in which the source of OH was the gasโphase photolysis of H~2~O~2~ with ultraviolet light produced by a highโpressure mercury arc lamp. Implications for the tropospheric cycle of CH~4~ are considered briefly.
๐ SIMILAR VOLUMES
Rates of oxidation of XCOO-(X = H, D) by Brz in acid aqueous media were measured between 274 and 332 K. The derived Arrhenius parameters for both reactions log k ~( M -l S-') = (11.81 f 0.10) -(14.33 f 0.13)/0 log ~D ( M -' S-') = (13.77 f 0.13) -(17.62 f 0.04)/0 where 0 = 4.575T X kcal/mol, with (
## Abstract The highโpressure isotopic rate ratio __k__~H~/__k__~D~ for isomerisation of cyclopropylamine and cyclopropylamineโNโ__d__~2~ is 1.06 at 649โ678 K, supporting a mechanism which does not involve migration of hydrogen from the amine group in the rateโdetermining step.