1,1,1-トリクロロエタンによるアルミニウムの溶解反応に対する有機試薬の阻害機構

概要

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The mechanism by which organic reagents prolong the induction period of the reaction between 1, 1, 1-trichloroethane (CCl3CH3) and aluminum (Al) was investigated in terms of changes in electrical conductivity. Organic reagents were first added in various concentrations to a CCl3CH3 solution containing AlCl3, which had high electrical conductivity due to the formation of the complex compound CCl2CH3+[AlCl4]-, and the electrical conductivity of the solution and the induction period of the reaction between the solution and Al were then measured. The results are summarized as follows: 1) Organic reagents such as amines, which markedly lower the electrical conductivity of the solution, had a strong retarding action on the reaction and were found to become a powerful inhibitor. Even after the dissolution of Al had set in, the addition of amines to the solution could inhibit it. 2) Alcohols and ethers had not a very great effect on the retarding action. This may be attributed to the fact that they failed to effect a significant decrease in electrical conductivity, or, when added in excessive amounts, even increased it. Alcohols and ethers could not inhibit the dissolution of Al once it had set in.
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