1.

An known alcohol is treated with the "Lucas reagent " to determine whether the alcohol is primary, secondary or tertiary . Which alcohol reacts fastest and by what mechanism

Answer»

Secondary ALCOHOL by `S_(N)^(1)`
Tertiary alcohol by `S_(N)^(1)`
Secondary alcohol by `S_(N)^(2)`
Tertiary alcohol by `S_(N)^(2)`

Solution :The reaction of alcohol with lucas reagent is mostly an `S_(N)^(1)` reaction and the rate of reaction is directly proportional to the carbocation STABILITY formed in the reaction, since`3^(@)` R-OH FORMS `3^(@)` carbocation HENCE it will react fastest.


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