Provide the correct order for the mechanistic steps for the following reaction: OH Br HBr H20 racemic Step 1 v [ Choose ] Carbocation formation Nucleophilic attack Step 2 Leaving group leaves Proton transfer Step 3 [ Choose ] Step 4 [Choose ]

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### Mechanistic Steps in Organic Reactions: HBr Addition to Alcohol

**Objective:**
Provide the correct order for the mechanistic steps for the following reaction:

**Reaction:**
\[ \text{CH}_3\text{CH(OH)-CH}_3 + \text{HBr} \rightarrow \text{CH}_3\text{CH(Br)-CH}_3 + \text{H}_2\text{O} \]

This reaction results in a racemic mixture where an alcohol group (-OH) is converted into a bromide (-Br) through the addition of hydrobromic acid (HBr).

**Steps to Determine:**

1. **Step 1: [Choose]**
2. **Step 2: [Choose]**
3. **Step 3: [Choose]**
4. **Step 4: [Choose]**

**Options:**

- **Carbocation formation**
- **Nucleophilic attack**
- **Leaving group leaves**
- **Proton transfer**

---

**Detailed Explanation of the Steps Involved:**

1. **Proton Transfer:**
   The reaction begins with the proton transfer where the hydroxyl group of the alcohol is protonated by HBr, resulting in the formation of a good leaving group (water).

2. **Leaving Group Leaves:**
   After protonation, the water molecule, now a good leaving group, leaves, leading to the formation of a carbocation intermediate.

3. **Carbocation Formation:**
   The departure of water leads to the formation of a carbocation intermediate. This step is crucial as it dictates the subsequent steps of the mechanism.

4. **Nucleophilic Attack:**
   Finally, the bromide ion (Br-) from hydrobromic acid attacks the positively charged carbocation, resulting in the formation of the final product, a racemic mixture of bromide-substituted compound.

**Interactive Section:**

Please select the correct order of the mechanistic steps from the dropdowns provided.

- **Step 1:** 
  - [Choose: Proton transfer]
- **Step 2:** 
  - [Choose: Leaving group leaves]
- **Step 3:** 
  - [Choose: Carbocation formation]
- **Step 4:** 
  - [Choose: Nucleophilic attack]

This section will help you solidify your understanding of the mechanistic steps involved in the reaction. Understanding these steps
Transcribed Image Text:### Mechanistic Steps in Organic Reactions: HBr Addition to Alcohol **Objective:** Provide the correct order for the mechanistic steps for the following reaction: **Reaction:** \[ \text{CH}_3\text{CH(OH)-CH}_3 + \text{HBr} \rightarrow \text{CH}_3\text{CH(Br)-CH}_3 + \text{H}_2\text{O} \] This reaction results in a racemic mixture where an alcohol group (-OH) is converted into a bromide (-Br) through the addition of hydrobromic acid (HBr). **Steps to Determine:** 1. **Step 1: [Choose]** 2. **Step 2: [Choose]** 3. **Step 3: [Choose]** 4. **Step 4: [Choose]** **Options:** - **Carbocation formation** - **Nucleophilic attack** - **Leaving group leaves** - **Proton transfer** --- **Detailed Explanation of the Steps Involved:** 1. **Proton Transfer:** The reaction begins with the proton transfer where the hydroxyl group of the alcohol is protonated by HBr, resulting in the formation of a good leaving group (water). 2. **Leaving Group Leaves:** After protonation, the water molecule, now a good leaving group, leaves, leading to the formation of a carbocation intermediate. 3. **Carbocation Formation:** The departure of water leads to the formation of a carbocation intermediate. This step is crucial as it dictates the subsequent steps of the mechanism. 4. **Nucleophilic Attack:** Finally, the bromide ion (Br-) from hydrobromic acid attacks the positively charged carbocation, resulting in the formation of the final product, a racemic mixture of bromide-substituted compound. **Interactive Section:** Please select the correct order of the mechanistic steps from the dropdowns provided. - **Step 1:** - [Choose: Proton transfer] - **Step 2:** - [Choose: Leaving group leaves] - **Step 3:** - [Choose: Carbocation formation] - **Step 4:** - [Choose: Nucleophilic attack] This section will help you solidify your understanding of the mechanistic steps involved in the reaction. Understanding these steps
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