Which of the following is a positive overlap which leads to bonding ? .

Options

A.
B.
C.
D.

Answer

To determine which of the given options represents a positive overlap that leads to bonding, we can analyze each option based on the principles of orbital overlap in chemical bonding.

### Step-by-Step Solution:

1. **Understand Orbital Overlap**:
- In chemical bonding, the overlap of atomic orbitals is crucial. Overlap can be positive, negative, or zero.
- Positive overlap occurs when orbitals with similar signs (e.g., both positive or both negative) overlap, leading to constructive interference and the formation of a bond.

2. **Analyze Option A**:
- Option A shows an overlap between an s orbital and a p orbital.
- Here, the overlap is described as zero overlap because there are two types of interferences: constructive (plus with plus) and destructive (plus with minus).
- **Conclusion**: No bond is formed in this case.

3. **Analyze Option B**:
- Option B involves a p orbital and a d orbital.
- The overlap here is characterized as negative overlap since the signs are opposite (plus overlaps with minus).
- **Conclusion**: This also does not lead to bonding.

4. **Analyze Option C**:
- Option C shows the overlap between two p orbitals (Px with Px).
- Both lobes overlap positively (plus with plus and minus with minus), indicating a positive overlap.
- **Conclusion**: This is a positive overlap and leads to bonding.

5. **Analyze Option D**:
- Option D consists of two d orbitals.
- The overlap is described as negative overlap (plus with minus and minus with plus).
- **Conclusion**: This does not lead to bonding.

6. **Final Answer**:
- Based on the analysis, the only option that represents a positive overlap leading to bonding is **Option C**.