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Consider the ollowing statement about SN...

Consider the ollowing statement about `SN^(1)` reaction
(i) it is a bimolecular reaction
(ii) it proceeds with retention as well as inversion of the configuration.
(iii) It involves the fomrationn of an intermediate cabocation
(iv) The reaction is carried in the presence of polar aprotic solvents

A

Only (i)

B

(i) and (ii)

C

(ii) and (iii)

D

(i), (ii), (iii), (iv)

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the statements about the SN1 reaction, let's break down each statement step by step. ### Step 1: Understanding the SN1 Reaction The SN1 reaction, or unimolecular nucleophilic substitution, is characterized by the following: - It is a **unimolecular reaction**, meaning the rate of reaction depends on the concentration of only one reactant. ### Step 2: Evaluating the Statements Now, let's evaluate each of the given statements: 1. **It is a bimolecular reaction.** - **Analysis**: This statement is **incorrect**. SN1 is a unimolecular reaction, not bimolecular. The rate-determining step involves only one molecule (the substrate), leading to the formation of a carbocation intermediate. 2. **It proceeds with retention as well as inversion of the configuration.** - **Analysis**: This statement is **correct**. In SN1 reactions, the nucleophile can attack the carbocation from either side, leading to both inversion (backside attack) and retention (frontside attack) of configuration. 3. **It involves the formation of an intermediate carbocation.** - **Analysis**: This statement is **correct**. The formation of a carbocation intermediate is a key feature of the SN1 mechanism, where the leaving group departs first, forming a positively charged carbocation. 4. **The reaction is carried in the presence of polar aprotic solvents.** - **Analysis**: This statement is **incorrect**. SN1 reactions are typically carried out in polar protic solvents, which stabilize the carbocation and the leaving group. ### Conclusion From the analysis: - Statement 1 is incorrect. - Statement 2 is correct. - Statement 3 is correct. - Statement 4 is incorrect. Thus, the correct statements are 2 and 3. ### Final Answer The correct option is **2 and 3**. ---
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