Reduction of trichloroethylene by outer-sphere electron-transfer agents.
A series of well-characterized outer-sphere electron-transfer agents were used to study the reduction of trichloroethylene (TCE). Through comparison of the final product ratios of cis-dichloroethylene (cDCE) to trans-dichloroethylene (tDCE) of the outer-sphere reductants to that observed for vitamin B12, it was found that an outer-sphere electron-transfer mechanism is not the likely major pathway in the reduction of TCE by B12. The results provide kinetic support for a two-step reduction mechanism by outer-sphere reductants that involves both vinyl radicals and vinyl anions. The results suggest that the [cDCE]:[tDCE] ratio can be used as a diagnostic for the mechanism of TCE reduction.
Follett
Angela D
AD
Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, USA.
McNeill
Kristopher
K
D004000:Dichloroethylenes / Q000737:chemistry; D004583:Electrons; D007700:Kinetics; D010084:Oxidation-Reduction; D014241:Trichloroethylene / Q000737:chemistry*; D014805:Vitamin B 12 / Q000737:chemistry*
D004000:Dichloroethylenes; D014241:Trichloroethylene; D014805:Vitamin B 12