Which of the following sets of conditions most favors the E1 mechanism? A) when

Question

Which of the following sets of conditions most favors the E1 mechanism? A) when the alkyl halide tertiary and the base is a weak base B) when alkyl halide is strong base is tertiary and the base is a strong base C) when the alkyl halide is primary or secondary and the base is a strong base D) when the alkyl halide is primary or secondary and the base is a strong base Rank the following alcohols in order of increasing reaction rate with HBr. I. CH_3CH_2CH_2CH_2OH II. (CH_3)_3COH III. CH_3CH_2CHCH_3_OH A) II

Explanation / Answer

4) option B is correct

5) option C is correct

Explanation: Reaction of alkylhalide with a weak nucleophile,HBr involves SN1 mechanism. SN1 reaction is favourable with tertiary alkyl halide due to the formation of more stable tertiary carbocation.

6) option D is correct

Reaction of primary alkyl halide and a strong base involves Sn2 and E2 mechanism

7) option A is correct

Explanation: Reaction of tertiary alkyl halide with a weak nucleophile involves Sn1 and E1 mechanism and produces substituted and eliminated products.

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