Which of the following statements are correct for butadiene
`overset(4)CH_(2)=overset(3)CH-overset(2)CH=overset(1)CH_(2)`
(1) The `C_(1)-C_(2) and C_(3)-C_(4)` bonds are longer than a carbon double bond.
(2) The `C_(1)-C_(2) and C_(3)-C_(4)` bonds are shorter than a carbon - carbon double bond.
(3) The `C_(2)-C_(3)` bond is slightly shorter than a carbon - carbon single bond.
(4) The `C_(2)-C_(3)` bond is slightly longer than a carbon - carbon double bond.

Options

A. 1, 2
B. 2, 3
C. 1, 3
D. 3, 4

Answer

To solve the question regarding butadiene and determine which statements are correct, we will analyze the structure of butadiene and the nature of its bonds.

### Step-by-Step Solution:

1. **Identify the Structure of Butadiene**:
Butadiene has the following structure:
\[ \text{CH}_2=\text{CH}-\text{CH}=\text{CH}_2 \]
We can number the carbon atoms as follows:
- C1: CH2
- C2: CH
- C3: CH
- C4: CH2

2. **Analyze the Bonds**:
- The bonds in butadiene include:
- C1-C2 (single bond)
- C2-C3 (single bond with partial double bond character due to resonance)
- C3-C4 (single bond)
- C1-C2 and C3-C4 are single bonds, while C2-C3 has partial double bond character.

3. **Resonance Structures**:
Butadiene can undergo resonance, which allows the double bonds to shift. This results in:
- C1-C2 and C3-C4 acquiring some partial double bond character.
- C2-C3 having a stronger bond than a typical single bond but weaker than a double bond.

4. **Evaluate Each Statement**:
- **Statement 1**: "The C1-C2 and C3-C4 bonds are longer than a carbon double bond."
- **True**: These bonds have partial double bond character but are still longer than a typical double bond.

- **Statement 2**: "The C1-C2 and C3-C4 bonds are shorter than a carbon-carbon double bond."
- **False**: These bonds are longer than a carbon-carbon double bond due to their partial character.

- **Statement 3**: "The C2-C3 bond is slightly shorter than a carbon-carbon single bond."
- **True**: The C2-C3 bond has partial double bond character, making it shorter than a typical single bond.

- **Statement 4**: "The C2-C3 bond is slightly longer than a carbon-carbon double bond."
- **False**: The C2-C3 bond is shorter than a carbon-carbon double bond due to its partial double bond character.

5. **Conclusion**:
The correct statements are:
- Statement 1 is correct.
- Statement 3 is correct.
- Statement 2 and Statement 4 are incorrect.

Thus, the correct answer is **1 and 3**.