Question

what is the rate determining step in the E1 mechanism for the dehydration of an alcohol?...

what is the rate determining step in the E1 mechanism for the dehydration of an alcohol?
a)addition of the halide
b)dissociation of the alkyloxonium ion to a carbocation and water.
c)protonation of the alcohol
d)elimination (deprotonation) of the beta proton
i think the correct answer is c because i remember hearing something about protonation in my lab, but i am still unclear. if soemkne can explain, that would be great
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Answer #1

Answer is b).

Rate determining step will be the slowest step of the mechanism. In E1 dehydration mechanism,slowest step is the removal of water from alkyloxonium ion to form reactive carbocation. Hence, b) is correct answer.

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