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R-Cl is hydrolysed to R-OH slowly but the reaction is rapid in presence of KI as catalyst. Explain. |
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Answer» SOLUTION :KI supplies `L^(-)` ion which is strong nucleophile and hence reacts RAPIDLY with R-Cl to form `R-I. I^(-)` is also a better leaving GROUP than `Cl^(-)` . Hence R-I is HYDROLYSED rapidly to form R-OH and `I^(-).. I^(-)`ion is again used in converting R-Cl to R-I. `R-Cl + H_2O overset("slow)(rarr)R-OH+Cl^(-)` `R-Cl + I^(-) underset(-Cl^(-))overset("fast")(rarr) R - I underset("fast")overset(+H_2O)(rarr)R-OH` |
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