Which of the following epoxides will always u | vedclass

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(C) The question refers to epoxides,which are cyclic ethers. Epoxides undergo ring-opening reactions via the $S_N2$ mechanism. In basic conditions,the

Vedclass · Accepted Answer

$CH_3-CH-CH_2-O$ (epoxide ring)

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(C) The question refers to epoxides,which are cyclic ethers. Epoxides undergo ring-opening reactions via the $S_N2$ mechanism. In basic conditions,the nucleophile attacks the less sterically hindered carbon atom of the epoxide ring via $S_N2$. In acidic conditions,the oxygen atom is protonated,which increases the electrophilicity of the ring carbons. Even in acidic conditions,the reaction proceeds via an $S_N2$-like mechanism where the nucleophile attacks the more substituted carbon if it has significant carbocation character,or the less substituted carbon due to steric factors. However,for simple epoxides like propylene oxide $(CH_3-CH-CH_2-O)$,the $S_N2$ pathway is dominant in both conditions. The options $A$ and $B$ are simple ethers,not epoxides,and do not typically undergo ring-opening $S_N2$ reactions. Therefore,the epoxide structure provided in option $C$ is the correct answer.

Which of the following epoxides will always undergo $S_N2$ mechanism in both acidic and basic conditions?

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