4. Provide an arrow pushing mechanism for the following transformation and clearly circle the slowest (rate-determining) step in the mechanism. [helpful reminder: the abbreviation for aqueous is aq. It refers to a solution of a reagent in water] .CI .CI aq. HBr 65 °C HO. Br

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**Problem 4: Reaction Mechanism and Rate-Determining Step**

**Objective:**
Provide an arrow pushing mechanism for the following transformation and clearly circle the slowest (rate-determining) step in the mechanism.

**Instructions:**
- Use arrow pushing to denote the movement of electrons throughout the reaction mechanism.
- Identify and circle the rate-determining step.

**Reaction Details:**
- Starting Material: A benzene ring with a chlorine atom (Cl) and a hydroxyl group (OH) attached at the 1 and 2 positions, respectively.
- Reagent: Aqueous hydrobromic acid (aq. HBr) at 65°C.
- Product: A benzene ring with a chlorine atom (Cl) and a bromine atom (Br) attached at the 1 and 2 positions, respectively, in place of the hydroxyl group.

**Notes:**
- "aq" stands for aqueous, indicating that the reagent is in a water solution.
- Pay particular attention to the step in the mechanism that determines the rate of the reaction and circle this step.
Transcribed Image Text:**Problem 4: Reaction Mechanism and Rate-Determining Step** **Objective:** Provide an arrow pushing mechanism for the following transformation and clearly circle the slowest (rate-determining) step in the mechanism. **Instructions:** - Use arrow pushing to denote the movement of electrons throughout the reaction mechanism. - Identify and circle the rate-determining step. **Reaction Details:** - Starting Material: A benzene ring with a chlorine atom (Cl) and a hydroxyl group (OH) attached at the 1 and 2 positions, respectively. - Reagent: Aqueous hydrobromic acid (aq. HBr) at 65°C. - Product: A benzene ring with a chlorine atom (Cl) and a bromine atom (Br) attached at the 1 and 2 positions, respectively, in place of the hydroxyl group. **Notes:** - "aq" stands for aqueous, indicating that the reagent is in a water solution. - Pay particular attention to the step in the mechanism that determines the rate of the reaction and circle this step.
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