8. Elimination Reactions

Which of the following is the most reactive substrate in an E$1$ reaction?

Consider the $E1$ reaction of the tertiary halide shown. Which of the following statements best describes the rate-determining step of this reaction?

Which of the following best describes the intermediate and major organic product formed in an E1 reaction of $C_2{H}_5{\mathrm{Br}}_1$ with methanol as solvent?

Given $2-\mathrm{bromo}-2-\mathrm{methylbutane}$, what alkene is the major product formed in an $E1$ reaction?

Which of the following molecules is most likely to undergo an $E1$ reaction when stirred in water?

Predict the product

Which of the following statements about an $E1$ mechanism is NOT true?

Which of the following reaction sequences best represents an $E1$ elimination of an alkyl halide with a carbocation rearrangement?

Predict the product

Propose mechanisms for the following reactions.

(a)

HINT: Alcohol dehydrations usually go through E1 elimination of the protonated alcohol, with a carbocation intermediate. Rearrangements are common.

a. Which reacts faster in an E2 reaction: 3-bromocyclohexene or bromocyclohexane?

b. Which reacts faster in an E1 reaction?

Draw the major product obtained when an alkyl halide in [PROBLEM 9-83] undergoes an E1 reaction.

c.