Hyperconjugation involves overlap of which of the following orbitals?

Options

A. `sigma-sigma`
B. `sigma-pi`
C. `pi-pi`
D. None of these

Answer

To solve the question regarding which orbitals are involved in hyperconjugation, we can follow these steps:

### Step 1: Understand Hyperconjugation
Hyperconjugation is a concept in organic chemistry that refers to the interaction between the electrons in a sigma bond (such as C-H or C-C) and an adjacent empty or partially filled p-orbital or a pi bond. This interaction helps to stabilize the molecule.

### Step 2: Identify the Orbitals Involved
In hyperconjugation, the key orbitals involved are:
- **Sigma (σ) bonds**: These are formed by the head-on overlap of atomic orbitals (like C-H or C-C bonds).
- **Pi (π) bonds**: These are formed by the side-to-side overlap of p-orbitals.

### Step 3: Analyze the Options
Given the options, we need to determine which orbital overlaps are relevant to hyperconjugation. The options might typically include:
- Sigma bonds
- Pi bonds
- Non-bonding orbitals
- Anti-bonding orbitals

### Step 4: Determine the Correct Answer
Since hyperconjugation specifically involves the interaction of sigma bonds with adjacent p-orbitals or pi bonds, the correct answer would be:
- **Sigma (σ) and Pi (π) bonds**.

Thus, the correct option is **B: Sigma Pi bond**.

### Final Answer
The correct answer is **B: Sigma Pi bond**.

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