Which of the alcohols listed below would you expect to react most rapidly with HBr, assuming the reaction pathway is predominantly Sn1? a) CH3CH2CH2CH2CH2OH b) (CH3)2CH2CH2OH c) (C... Which of the alcohols listed below would you expect to react most rapidly with HBr, assuming the reaction pathway is predominantly Sn1? a) CH3CH2CH2CH2CH2OH b) (CH3)2CH2CH2OH c) (CH3)2CHCHOH3 d) CH3CH2CH2CH2OH e) (CH3)2C(CH3)OH
Understand the Problem
The question is asking which alcohol from the provided list would react most rapidly with HBr, under the assumption that the reaction follows an Sn1 pathway. To answer this, we will consider the structure of the alcohols and their stability as carbocations, as Sn1 reactions favor more stable intermediates.
Answer
(CH3)2C(CH3)OH
The alcohol (CH3)2C(CH3)OH (option e) will react most rapidly with HBr via the SN1 pathway.
Answer for screen readers
The alcohol (CH3)2C(CH3)OH (option e) will react most rapidly with HBr via the SN1 pathway.
More Information
Tertiary alcohols react more rapidly with HBr in an SN1 mechanism due to the formation of a stable tertiary carbocation.
Tips
Avoid assuming that all alcohols react at the same rate; tertiary carbocations are more stable.
Sources
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