Which of the two do you think is more important contributor to the resonance hybrid ?

Options

A.
B.
C.
D.

Explanation

To determine which structure is the more important contributor to the resonance hybrid, we need to analyze the given structures based on the stability of their electron configurations, particularly focusing on whether they satisfy the octet rule.

### Step-by-Step Solution:

1. **Identify the Structures**:
We have four structures (A, B, C, D) to consider. Each structure contains different arrangements of atoms and bonds.

2. **Check the Octet Rule**:
For each structure, we need to check if all the atoms have a complete octet (8 electrons) in their outer shell.
- **Structure A**:
- Carbon (C): 4 electrons (not complete)
- Nitrogen (N): 8 electrons (complete)
- Hydrogen (H): 2 electrons (complete)
- **Structure B**:
- Carbon (C): 8 electrons (complete)
- Nitrogen (N): 8 electrons (complete)
- Hydrogen (H): 2 electrons (complete)
- **Structure C**:
- Carbon (C): 8 electrons (complete)
- Nitrogen (N): 6 electrons (not complete)
- Hydrogen (H): 2 electrons (complete)
- **Structure D**:
- Carbon (C): not complete
- Nitrogen (N): not complete
- Hydrogen (H): complete

3. **Evaluate Stability**:
Structures where all atoms have complete octets are generally more stable and thus contribute more significantly to the resonance hybrid.
- **Structure A**: Not stable due to incomplete octet of carbon.
- **Structure B**: Stable, all atoms have complete octets.
- **Structure C**: Not stable due to incomplete octet of nitrogen.
- **Structure D**: Not stable due to incomplete octets of carbon and nitrogen.

4. **Determine the Major Contributor**:
Since Structure B is the only one where all atoms have complete octets, it is the most important contributor to the resonance hybrid.

5. **Conclusion**:
The most important contributor to the resonance hybrid is Structure B.