How many alkenyl group can be derived from propane?

Options

A. `4`
B. `3`
C. `2`
D. `1`

Explanation

To determine how many alkenyl groups can be derived from propane, we need to analyze the structure of propane and the possible ways to remove one hydrogen atom to create alkenyl groups.

### Step-by-Step Solution:

1. **Identify the Structure of Propane**:
Propane (C₃H₈) has the following structure:
\[ CH₃-CH₂-CH₃ \]
This means that propane consists of three carbon atoms connected by single bonds.

2. **Understanding Alkenyl Groups**:
An alkenyl group is derived from an alkene by removing one hydrogen atom. For propane, we can derive alkenyl groups by converting propane into propene (C₃H₆) through the removal of one hydrogen atom.

3. **Identify Possible Alkenyl Groups**:
- When we remove a hydrogen atom from propane, we can do so from different carbon atoms.
- The structure of propene (C₃H₆) can be represented as:
\[ CH₃-CH=CH₂ \]
- The alkenyl groups that can be derived from propene are:
- **1-Propene**: Removing a hydrogen from the terminal carbon (C1).
- **2-Propene**: Removing a hydrogen from the middle carbon (C2).

4. **Count the Unique Alkenyl Groups**:
- From the structure of propene, we can see that there are two unique alkenyl groups:
1. **Vinyl group (CH₂=CH-CH₃)**: Derived from removing a hydrogen from the terminal carbon.
2. **Allyl group (CH₃-CH=CH₂)**: Derived from removing a hydrogen from the middle carbon.

5. **Conclusion**:
Therefore, the total number of unique alkenyl groups that can be derived from propane is **2**.

### Final Answer:
There are **2 alkenyl groups** that can be derived from propane.

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