The products expected to be formed in the Wurtz reaction of a mixture of neopentyl bromide and isobutyl bromide are :
(i) 2,2,4-trimethylpentane
(ii) 2,2,5,5-tetramethylhexane
(iii) 2,2,4,4- tetramethlhexane
(iv) 2,5-dimethylhexane
(v) 2,2,5-trimethylhexane

Options

A. (ii) , (iii) and (v)
B. (ii) ,(iv) and (v)
C. (i) , (iv) and (v)
D. (i) ,(iii) and (v)

Answer

To solve the problem of predicting the products formed in the Wurtz reaction of a mixture of neopentyl bromide and isobutyl bromide, we will follow these steps:

### Step 1: Understand the Wurtz Reaction
The Wurtz reaction involves the coupling of two alkyl halides in the presence of sodium metal. This reaction typically produces alkanes by removing the halide ions (Br) and forming a new carbon-carbon bond.

### Step 2: Identify the Structures of the Reactants
- **Neopentyl bromide**: The structure can be represented as:
\[ \text{(CH}_3\text{)}_4\text{CBr} \quad \text{(or CH}_3\text{)C(CH}_3\text{)}_2\text{CH}_2\text{Br} \]
- **Isobutyl bromide**: The structure can be represented as:
\[ \text{(CH}_3\text{)}_2\text{CHCH}_2\text{Br} \]

### Step 3: Predict the Products
1. **Neopentyl bromide reacts with itself**:
- Two neopentyl bromide molecules will couple to form:
\[ \text{(CH}_3\text{)}_4\text{C-C(Br)}_2 \rightarrow \text{2,2,5,5-tetramethylhexane} \]

2. **Isobutyl bromide reacts with itself**:
- Two isobutyl bromide molecules will couple to form:
\[ \text{(CH}_3\text{)}_2\text{CH-CH}_2\text{C(Br)}_2 \rightarrow \text{2,5-dimethylhexane} \]

3. **Neopentyl bromide reacts with isobutyl bromide**:
- A neopentyl bromide and an isobutyl bromide will couple to form:
\[ \text{(CH}_3\text{)}_4\text{C-C(Br)} \rightarrow \text{2,2,5-trimethylhexane} \]

### Step 4: List the Products
From the above reactions, we can summarize the expected products:
- 2,2,5,5-tetramethylhexane
- 2,5-dimethylhexane
- 2,2,5-trimethylhexane

### Step 5: Match with Given Options
Now we compare our products with the options provided:
- (i) 2,2,4-trimethylpentane - Not formed
- (ii) 2,2,5,5-tetramethylhexane - Formed
- (iii) 2,2,4,4-tetramethylhexane - Not formed
- (iv) 2,5-dimethylhexane - Formed
- (v) 2,2,5-trimethylhexane - Formed

### Conclusion
The correct products expected from the Wurtz reaction of a mixture of neopentyl bromide and isobutyl bromide are:
- (ii) 2,2,5,5-tetramethylhexane
- (iv) 2,5-dimethylhexane
- (v) 2,2,5-trimethylhexane

Thus, the answer is **(ii), (iv), and (v)**.

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