Select the answer that best explains the observed rate of reactivity of the following 2 degree...

Question:

Select the answer that best explains the observed rate of reactivity of the following 2 degree alkyl halides in SN1 reaction

A. The least reactive compound gives an aromatic intermediate carbocation, which makes it a very unstable intermediate. The most reactive compound gives an intermediate carbocation that is not aromatic, which makes it a very stable intermediate.

B. The least reactive compound gives an antiaromatic intermediate carbocation, which makes it a very unstable intermediate. The most reactive compound gives an aromatic intermediate carbocation, which makes it a very stable intermediate.

C. The least reactive compound gives a carbocation intermediate that is not aromatic, which makes it a very unstable intermediate. The most reactive compound gives an aromatic intermediate carbocation, which makes it a very stable intermediate.

D. The least reactive compound gives an aromatic intermediate carbocation, which makes it a very unstable intermediate. The most reactive compound gives an antiaromatic intermediate carbocation, which makes it a very stable intermediate.

Substitution Reactions:

There are two mechanisms for a substitution reaction: SN1, which is the unimolecular mechanism, and SN2, which is bimolecular. SN1 is a two-step process: in the first step, the leaving group leaves, and in the second, the nucleophile attacks. This mechanism happens when the substrate or the nucleophile are bulky, making it difficult for the nucleophile to approach the back of the target carbon atom. SN2 is a concerted mechanisms, where all the steps happen simultaneously: the nucleophile attacks the back of the target carbon, and the leaving group is pushed away. This works whenever steric hindrance is not a problem.

Answer and Explanation: 1

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We don't have the names or the structures of the alkyl halides in question, but knowledge of the SN1 reaction mechanism should be enough to tell which...

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Aromatic Hydrocarbons: Definition, Examples & Uses

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Chapter 18 / Lesson 9
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Learn about aromatic hydrocarbons. Discover the definition, identifying properties, and structure of aromatic hydrocarbons, and see a list of examples.


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