Acetone will be obtained by the ozonolysis of

Options

A. 1-Butene
B. 2-Butene
C. Isobutene
D. 2-Butene.

Explanation

To determine which compound will yield acetone upon ozonolysis, we need to analyze the given options step by step.

### Step 1: Understand the Structure of Acetone
Acetone has the chemical formula \( \text{C}_3\text{H}_6\text{O} \) and its structural formula is \( \text{CH}_3\text{C(=O)}\text{CH}_3 \). This indicates that acetone is a ketone with two methyl groups attached to a carbonyl group.

### Step 2: Analyze Each Option for Ozonolysis

#### Option A: 1-Butene
1. **Structure**: The structure of 1-butene is \( \text{CH}_3\text{CH}_2\text{CH}=\text{CH}_2 \).
2. **Ozonolysis Reaction**: When 1-butene undergoes ozonolysis, it reacts with ozone (\( \text{O}_3 \)) to form an ozonide.
3. **Reductive Workup**: The ozonide is then reduced, leading to the formation of:
- One molecule of formaldehyde (\( \text{HCHO} \))
- One molecule of propanal (\( \text{CH}_3\text{CH}_2\text{CHO} \))
4. **Conclusion**: This option does not yield acetone.

#### Option B: 2-Butene
1. **Structure**: The structure of 2-butene is \( \text{CH}_3\text{CH}=\text{CH}\text{CH}_3 \).
2. **Ozonolysis Reaction**: When 2-butene undergoes ozonolysis, it forms an ozonide.
3. **Reductive Workup**: The ozonide is reduced to yield:
- Two molecules of acetaldehyde (\( \text{CH}_3\text{CHO} \))
4. **Conclusion**: This option also does not yield acetone.

#### Option C: Isobutene
1. **Structure**: The structure of isobutene is \( \text{CH}_3\text{C}(\text{CH}_3)=\text{CH}_2 \).
2. **Ozonolysis Reaction**: Upon ozonolysis, isobutene reacts with ozone to form an ozonide.
3. **Reductive Workup**: The ozonide is reduced to yield:
- One molecule of acetone (\( \text{CH}_3\text{C(=O)}\text{CH}_3 \))
- One molecule of formaldehyde (\( \text{HCHO} \))
4. **Conclusion**: This option yields acetone.

### Final Answer
The correct answer is **C: Isobutene**.