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The give reaction H-underset(CH3)under...

The give reaction
`H-underset(CH_3)underset(|)overset(CH_2-CH_3)overset(|)(C )-Br " "overset(Theta)overset(OH)(rarr)HO-underset(CH_3)underset(|)overset(CH_2-CH_3)overset(|)(C )-H`
Is an example of

A

`S_E2`

B

`S_N1`

C

`S_N2`

D

`S_E1`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the given reaction, we need to analyze the reaction mechanism and identify whether it is an SN1 or SN2 reaction. ### Step-by-Step Solution: 1. **Identify the Reactants and Products**: - The reactant is an alkyl bromide (with a bromine atom attached to a carbon that is also bonded to two other groups: a methyl group and an ethyl group). - The product is an alcohol (where the bromine atom has been replaced by a hydroxyl group, -OH). 2. **Determine the Type of Reaction**: - The reaction involves the substitution of a bromine atom (a good leaving group) with a hydroxyl group (a nucleophile). - We need to determine if this substitution occurs via an SN1 or SN2 mechanism. 3. **Analyze the Mechanism**: - **SN1 Mechanism**: This involves two steps: 1. Formation of a carbocation intermediate after the leaving group departs. 2. Nucleophilic attack on the carbocation. - **SN2 Mechanism**: This involves a single concerted step where the nucleophile attacks the carbon from the opposite side of the leaving group, leading to inversion of configuration. 4. **Consider the Structure**: - The substrate is likely a tertiary or secondary alkyl halide due to the presence of branching (methyl and ethyl groups). - Tertiary substrates typically favor SN1 reactions due to the stability of the carbocation formed. 5. **Evaluate the Nucleophile**: - The hydroxide ion (OH-) is a strong nucleophile and can effectively attack the carbon atom. - In SN2 reactions, the nucleophile attacks from the backside, leading to inversion of configuration. 6. **Conclusion**: - Since the reaction involves substitution with a strong nucleophile and the structure suggests a tertiary carbon, the reaction is likely an **SN1 reaction**. However, if the nucleophile attacks from the backside in a concerted manner, it could also be an SN2 reaction. - Given the information, the reaction is best classified as **SN2** due to the mechanism described in the transcript, where there is a direct attack by the nucleophile. ### Final Answer: The given reaction is an example of **SN2 reaction**.
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