Kinetic bromine isotope effect: example from the microbial debromination of brominated phenols
✍ Scribed by Anat Bernstein, Zeev Ronen, Elena Levin…
- Book ID
- 120752073
- Publisher
- Springer
- Year
- 2012
- Tongue
- English
- Weight
- 241 KB
- Volume
- 405
- Category
- Article
- ISSN
- 1618-2650
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The competitive reactions of Br atoms with CH, and CD, were studied over the temperature range of 562' to 637°K. Over this temperature interval, the kinetic isotope effect, k,/k,, varied from 3.05 to 2.47 for the reactions Br + CH, -% HBr + CH, The rate constant ratio k,/k, , expressed in Arrhenius
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 (