Ozonolysis of 2,3-dimethylbut-1-ene followed by reduction with zinc and water gives

Options

A. methanal and hexanoic acid
B. methanoic acid and butanone
C. methanal and 3-methylbutan-2-one
D. butanoic acid and 2,3-diimethylbutanoic acid.

Explanation

To solve the problem of the ozonolysis of 2,3-dimethylbut-1-ene followed by reduction with zinc and water, we can break down the process into clear steps.

### Step-by-Step Solution:

1. **Identify the Structure of 2,3-Dimethylbut-1-ene**:
- The molecular formula for 2,3-dimethylbut-1-ene is C₆H₁₂. The structure can be represented as:
```
CH3
|
CH3-C=CH-CH3
|
H
```

2. **Ozonolysis Reaction**:
- Ozonolysis involves the reaction of an alkene with ozone (O₃) to form an ozonide, which is an unstable intermediate. The double bond in 2,3-dimethylbut-1-ene reacts with ozone, forming a cyclic ozonide.
- The ozonide will then break down into carbonyl compounds.

3. **Formation of Carbonyl Compounds**:
- The ozonide decomposes to yield two products:
- **Formaldehyde (HCHO)** from one part of the molecule.
- **3-Methylbutan-2-one (C₅H₁₀O)** from the other part.
- The structure of 3-methylbutan-2-one can be represented as:
```
CH3
|
CH3-C-CH3
||
O
```

4. **Reduction with Zinc and Water**:
- The next step involves the reduction of the carbonyl compounds formed. Zinc in the presence of water will reduce the aldehyde (formaldehyde) to methanol (CH₃OH) and will not affect the ketone.
- Therefore, the products after reduction will be:
- **Methanol (CH₃OH)** from formaldehyde.
- **3-Methylbutan-2-one (C₅H₁₀O)** remains unchanged.

5. **Final Products**:
- The final products of the ozonolysis of 2,3-dimethylbut-1-ene followed by reduction with zinc and water are:
- **Methanol (CH₃OH)**
- **3-Methylbutan-2-one (C₅H₁₀O)**