Compound which gives acetone on ozonolysis

Options

A. `CH_(3)-CH=CH-CH_(3)`
B. `(CH_(3))_(2) C = C ( CH_(3))_(2)`
C. `C_(6)H_(5)CH=CH_(2)`
D. `CH_(3)-CH=CH_(2)`

Answer

To determine which compound gives acetone on ozonolysis, we need to analyze the ozonolysis reaction process and the given options systematically. Here’s a step-by-step solution:

### Step 1: Understand Ozonolysis
Ozonolysis is a reaction involving the cleavage of double bonds (C=C) in alkenes by ozone (O3). The double bond is broken, and oxygen atoms are added to the resulting fragments, leading to the formation of carbonyl compounds (aldehydes or ketones).

### Step 2: Identify the Structure of Acetone
Acetone has the molecular formula \( CH_3COCH_3 \). It is a ketone with two methyl groups attached to a carbonyl group.

### Step 3: Analyze Each Option
We will evaluate each option to see if ozonolysis of the compound leads to the formation of acetone.

#### Option A:
Assume the compound is \( CH_3CH=CH_2 \) (propene).
- Ozonolysis would yield \( CH_3CHO \) (acetaldehyde) and \( HCHO \) (formaldehyde).
- **Result**: Not acetone.

#### Option B:
Assume the compound is \( CH_3C=CH_2 \) (isobutylene).
- Ozonolysis would yield two moles of acetone \( (CH_3COCH_3) \).
- **Result**: This option gives acetone.

#### Option C:
Assume the compound is \( C_6H_5CH=CH_2 \) (styrene).
- Ozonolysis would yield \( C_6H_5CHO \) (benzaldehyde) and \( HCHO \) (formaldehyde).
- **Result**: Not acetone.

#### Option D:
Assume the compound is \( CH_2=CHCHO \) (acrolein).
- Ozonolysis would yield \( HCHO \) (formaldehyde) and \( CH_3COOH \) (acetic acid).
- **Result**: Not acetone.

### Step 4: Conclusion
After analyzing all options, **Option B** is the only compound that gives acetone upon ozonolysis.

### Final Answer
The compound which gives acetone on ozonolysis is **Option B**.

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