8. Elimination Reactions

Which of the following best describes the curved arrow notation for the $E2$ elimination mechanism when a strong base abstracts a proton from a $\beta$-carbon adjacent to a leaving group?

For the dehydrohalogenation ($E2$) reaction shown, which of the following statements is correct about the mechanism?

Which of the following statements correctly describes the major product formed in an $E_2$ elimination reaction of $2_{\mathrm{bromobutane}}$ with a strong base?

Which of the following reagents will favor an $E_2$ reaction with all substrates?

In the following compound, which of the labeled protons ($A$, $B$, $C$, or $D$) is most readily abstracted under $E_2$ conditions? (Assume the leaving group is positioned anti-periplanar to proton $B$.)

Which of the following is the major organic product formed when 2-bromobutane reacts with a strong base such as $O^{2}H-$ in an E2 elimination reaction?

Which of the following alkyl chlorides is most likely to undergo an $E_2$ elimination reaction when treated with a strong base?

Which of the following conditions will most likely promote an $E2$ reaction with an alkyl halide?

Which of the following alkyl chlorides will afford only a single alkene product ($A$) exclusively under $E2$ reaction conditions?

Which of the following is the major E2 product formed from the elimination of ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{Br}}_1$ (1-bromopropane) with a strong base?

Which of the following is the least reactive substrate in an $E_2$ reaction?

Which of the following organic bromides would undergo E$2_{}$ dehydrohalogenation to give $1_{}-{\mathrm{hexene}}_{}$ as the only alkene product?

What is the major organic product formed when $C_2{H}_5{\mathrm{Br}}_1$ (ethyl bromide) reacts with a strong base such as $O_2{H}_1-$ (ethoxide ion) in an E2 elimination reaction?

Which of the following is the major $E_2$ reaction product formed when $\text{cis-1-chloro-2-ethylcyclohexane}$ is treated with a strong base?

When $2-\mathrm{bromo}-2,3-\mathrm{dimethylbutane}$ is heated with $\mathrm{sodium} \mathrm{methoxide}$, which is the major alkene product formed via the $E2$ mechanism?