Allyl isocyanide contains `sigma` and `pi` bonds are-

Options

A. `9sigma and 3 pi`
B. `9 sigma and 9 pi `
C. `3 sigma and 4 pi`
D. `5 sigma and 7 pi`

Answer

To determine the number of sigma (σ) and pi (π) bonds in allyl isocyanide, we will analyze its structure step by step.

### Step 1: Understand the Structure of Allyl Isocyanide
Allyl isocyanide has the following structure:
- It consists of a carbon chain with a double bond and a functional group (isocyanide).
- The general formula for allyl isocyanide can be represented as CH2=CH-CH2-NC.

### Step 2: Identify the Bonds
1. **Single Bonds (σ bonds)**:
- In allyl isocyanide, we have:
- 2 C-H bonds from the first carbon (CH2).
- 1 C-H bond from the second carbon (CH).
- 1 C-H bond from the third carbon (CH2).
- 1 C-C bond between the first and second carbon.
- 1 C-C bond between the second and third carbon.
- 1 C-N bond from the last carbon to nitrogen.
- Total single bonds (σ bonds) = 2 (from first C) + 1 (from second C) + 1 (from third C) + 1 (C-C) + 1 (C-C) + 1 (C-N) = 7 σ bonds.

2. **Double Bonds (π bonds)**:
- There is one double bond between the first and second carbon (C=C), which contains:
- 1 σ bond and 1 π bond.
- The isocyanide functional group (N≡C) has a triple bond, which contains:
- 1 σ bond and 2 π bonds.
- Total double bonds (π bonds) = 1 (from C=C) + 2 (from N≡C) = 3 π bonds.

### Step 3: Count Total Bonds
- Total σ bonds = 7
- Total π bonds = 3

### Final Answer
Allyl isocyanide contains **7 sigma (σ) bonds and 3 pi (π) bonds**.

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