Which of the following statements is/are true about an SN2 reaction? Select one: O A. The reaction is fastest with 1° halides. OB. All of the statements are true. O C. Changing the identity of the leaving group changes the rate of the reaction. O D. The reaction follows an overall 2nd order rate law. Clear my choice

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**Question on SN2 Reaction Characteristics**

**Which of the following statements is/are true about an SN2 reaction?**

Select one:

- **A.** The reaction is fastest with 1° halides.

- **B.** All of the statements are true.

- **C.** Changing the identity of the leaving group changes the rate of the reaction.

- **D.** The reaction follows an overall 2nd order rate law.

**Explanation:**

An SN2 reaction, or bimolecular nucleophilic substitution, is a type of reaction where a nucleophile attacks the carbon atom bonded to a leaving group, resulting in the inversion of configuration. It's characterized by its simplicity and specific kinetic properties:

- **A.** SN2 reactions occur most efficiently with primary (1°) halides due to less steric hindrance compared to secondary and tertiary halides.
  
- **B.** If selected, this option acknowledges that all provided statements about the SN2 reaction are correct.
  
- **C.** The rate of an SN2 reaction is indeed affected by the nature of the leaving group. Better leaving groups, which are more stable once they have left with their pairs of electrons, accelerate the reaction rate.

- **D.** SN2 reactions follow a second-order rate law, meaning the rate is dependent on the concentration of both the substrate (R-X) and the nucleophile, expressed as Rate = k[R-X][Nu].

**Follow-up Question on Alkyl Halide Reaction**

A certain alkyl halide, R-X, undergoes an elimination reaction. The observed rate law for this reaction is:

**Rate = k(R-X).**

**What is the mechanism for this reaction?**

**Explanation:**

This question is aimed at determining the mechanism based on the rate law. Given that the rate is only dependent on the concentration of the alkyl halide (R-X), it suggests a unimolecular process, typical of an E1 (unimolecular elimination) reaction. In contrast, an E2 mechanism would involve both the alkyl halide and a base, resulting in a second-order rate law.
Transcribed Image Text:**Question on SN2 Reaction Characteristics** **Which of the following statements is/are true about an SN2 reaction?** Select one: - **A.** The reaction is fastest with 1° halides. - **B.** All of the statements are true. - **C.** Changing the identity of the leaving group changes the rate of the reaction. - **D.** The reaction follows an overall 2nd order rate law. **Explanation:** An SN2 reaction, or bimolecular nucleophilic substitution, is a type of reaction where a nucleophile attacks the carbon atom bonded to a leaving group, resulting in the inversion of configuration. It's characterized by its simplicity and specific kinetic properties: - **A.** SN2 reactions occur most efficiently with primary (1°) halides due to less steric hindrance compared to secondary and tertiary halides. - **B.** If selected, this option acknowledges that all provided statements about the SN2 reaction are correct. - **C.** The rate of an SN2 reaction is indeed affected by the nature of the leaving group. Better leaving groups, which are more stable once they have left with their pairs of electrons, accelerate the reaction rate. - **D.** SN2 reactions follow a second-order rate law, meaning the rate is dependent on the concentration of both the substrate (R-X) and the nucleophile, expressed as Rate = k[R-X][Nu]. **Follow-up Question on Alkyl Halide Reaction** A certain alkyl halide, R-X, undergoes an elimination reaction. The observed rate law for this reaction is: **Rate = k(R-X).** **What is the mechanism for this reaction?** **Explanation:** This question is aimed at determining the mechanism based on the rate law. Given that the rate is only dependent on the concentration of the alkyl halide (R-X), it suggests a unimolecular process, typical of an E1 (unimolecular elimination) reaction. In contrast, an E2 mechanism would involve both the alkyl halide and a base, resulting in a second-order rate law.
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