Ozonolysis of an organic compound (A) produces acetone and acetaldehyde. Identify 'A' from the following compounds

Options

A. `2-` Methyl `-1-` butene
B. `1-` Pentene
C. `2 -` Pentene
D. `2-` Methyl `-2-` butene

Answer

To solve the problem of identifying the organic compound (A) that undergoes ozonolysis to produce acetone and acetaldehyde, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ozonolysis**: Ozonolysis is a reaction where alkenes react with ozone (O3) to form carbonyl compounds (aldehydes and ketones). The products depend on the structure of the alkene.

2. **Identifying the Products**: The products given are acetone (CH3COCH3) and acetaldehyde (CH3CHO). Acetone is a ketone and acetaldehyde is an aldehyde.

3. **Analyzing the Carbon Count**:
- Acetone has 3 carbons.
- Acetaldehyde has 2 carbons.
- Therefore, the total number of carbons from the products is 5. The compound (A) must also have 5 carbons.

4. **Considering Possible Structures**: We need to evaluate the possible structures of alkenes that can yield these products upon ozonolysis. The options provided include:
- 2-methyl-1-butene
- 1-pentene
- 2-pentene
- 2-methyl-2-butene

5. **Evaluating Each Compound**:
- **2-methyl-1-butene**:
- Structure: CH2=C(CH3)CH2CH3
- Ozonolysis would not yield both products; it would yield different aldehydes.
- **1-pentene**:
- Structure: CH2=CH(CH2)3CH3
- Ozonolysis would yield products that do not include acetone.
- **2-pentene**:
- Structure: CH3-CH=CH-CH3
- Ozonolysis would yield products that do not include acetone.
- **2-methyl-2-butene**:
- Structure: CH3-C(CH3)=C(CH3)-CH3
- Ozonolysis of this compound would yield acetone and acetaldehyde.

6. **Conclusion**: Based on the analysis, the correct compound (A) that produces acetone and acetaldehyde upon ozonolysis is **2-methyl-2-butene**.

### Final Answer:
The organic compound (A) is **2-methyl-2-butene**.