Kinetics and mechanism of oxidation of Cr(II) ions by tetrachloromethane
- 1 January 1980
- journal article
- Published by Institute of Organic Chemistry & Biochemistry in Collection of Czechoslovak Chemical Communications
- Vol. 45 (1) , 21-25
- https://doi.org/10.1135/cccc19800021
Abstract
Kinetics of the redox reaction of Cr(II) ions with tetrachloromethane has been studied in H2O-CH3OH-HClO4 and H2O-CH3COOH-HClO4. In the redox reaction 2 moles of Cr(II) are consumed per one mol of CCl4, and CrCl2+ and CrCCL2+3 ions are formed in the same amounts. Second order rate constants (k293 = 2.31 mol-1 s -1 in 50% CH3OH, k293 = 1.66 l . mol-1 s-1 in 50% CH3COOH) are independent of H+ ions concentration.The rate determining step is an inner sphere transfer of the halogen from CCl4 to Cr(II), the Cr-Cl-C bridge structure being retained in both media.Keywords
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