Reaction of 1,1,1-Trichloroethane with Zero-Valent Metals and Bimetallic Reductants

摘要: Information concerning the pathways and products of reaction 1,1,1-trichloroethane (1,1,1-TCA) with zero-valent metals may be critical to success in situ treatment techniques. Many researchers assume that alkyl polyhalides undergo reduction via stepwise hydrogenolysis (replacement halogen by hydrogen). Accordingly, 1,1,1-TCA should react 1,1-dichloroethane (1,1-DCA), chloroethane, finally ethane. Experiments conducted laboratory-scale batch reactors indicate, however, zinc, iron, two bimetallic reductants (nickel-plated iron copper-plated iron) this simplistic scheme cannot explain observed results. was found rapidly zinc form ethane 1,1-DCA. Independent experiments confirmed 1,1-DCA reacts too slowly represent an intermediate formation In reactions nickel/iron, copper/iron, cis-2-butene, ethylene, 2-butyne were also as minor products. Product ratios dependent o...