Autor: |
Katarzyna Brudnik, Jerzy T. Jodkowski, Agnieszka A. Gola, Dariusz Sarzyński |
Rok vydání: |
2011 |
Předmět: |
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Zdroj: |
Chemical Physics Letters. 514:220-225 |
ISSN: |
0009-2614 |
Popis: |
The kinetics of the gas-phase reactions of chlorine atoms with dichloromethane (CH 2 Cl 2 ) and D-dichloromethane (CD 2 Cl 2 ) was studied using the relative rate method with Cl + CH 3 Br as the reference reaction. The rate constants for H-abstraction from CH 2 Cl 2 ( k H ) and D-abstraction from CD 2 Cl 2 ( k D ) were measured in the temperature range of 298–527 K and at a total pressure of 100 Torr using N 2 as a diluent. The temperature dependencies of the rate constants (with the 2 σ error limits) are described by the expressions: k H = (8.69 ± 0.82) × 10 −12 × exp(−955 ± 20/ T ) and k D = (6.98 ± 0.91) × 10 −12 × exp(−1285 ± 25/ T ) cm 3 molecule −1 s −1 . The kinetic isotope effect, described by the ratio k H / k D , was found of 3.8 ± 0.2 at room temperature. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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