The following of `pie` and `sigma` bonds in touleneis repectively

Options

A. 3 and 6
B. 6 and 12
C. 3 and 10
D. 6 and 10

Answer

To solve the question regarding the number of π (pi) and σ (sigma) bonds in toluene, we will follow these steps:

### Step 1: Understand the Structure of Toluene
Toluene is a methyl-substituted benzene. Its chemical formula is C7H8. The structure consists of a benzene ring (C6H5) with a methyl group (CH3) attached to one of the carbon atoms.

### Step 2: Draw the Structure of Toluene
The structure of toluene can be represented as follows:
```
H
|
H--C--H
| |
H--C--C--C--H
| |
H--C--H
|
CH3
```
In this structure, the benzene ring consists of 6 carbon atoms, and the methyl group adds one more carbon atom.

### Step 3: Count the Sigma Bonds
1. **Sigma Bonds in the Benzene Ring**:
- Each carbon in the benzene ring is bonded to two other carbons and one hydrogen.
- There are 6 carbon atoms in the benzene ring, contributing 6 C-H bonds and 6 C-C bonds.
- Total sigma bonds from the benzene ring = 6 (C-H) + 6 (C-C) = 12 sigma bonds.

2. **Sigma Bonds from the Methyl Group**:
- The methyl group (CH3) has 3 C-H bonds.
- Total sigma bonds from the methyl group = 3.

3. **Total Sigma Bonds**:
- Total sigma bonds = Sigma bonds from benzene + Sigma bonds from methyl group = 12 + 3 = 15.

### Step 4: Count the Pi Bonds
- The benzene ring has alternating double bonds, which means there are 3 pi bonds in the benzene structure.
- The methyl group does not contribute any pi bonds.

### Step 5: Calculate the Number of Pi Electrons
- Each pi bond consists of 2 electrons.
- Therefore, the total number of pi electrons = Number of pi bonds × 2 = 3 × 2 = 6.

### Final Answer
- The number of sigma bonds in toluene is **15**.
- The number of pi electrons in toluene is **6**.

### Summary
- **Sigma Bonds**: 15
- **Pi Electrons**: 6