1,3 butadiene is an example of

Options

A. cumulated diene
B. Conjugated diene
C. isolated diene
D. none of the above

Answer

To determine what type of compound 1,3-butadiene is, we can follow these steps:

### Step 1: Identify the Structure of 1,3-butadiene
1,3-butadiene has four carbon atoms (C) and two double bonds (C=C). The structure can be represented as follows:
```
H H H H
\ / \ /
C = C - C = C
/ \ / \
H H H H
```
In this structure, the double bonds are located between the first and second carbon atoms and between the third and fourth carbon atoms.

### Step 2: Analyze the Position of Double Bonds
In 1,3-butadiene, the two double bonds are separated by a single bond (C-C). This is a key feature in identifying the type of diene.

### Step 3: Classify the Diene
- **Conjugated Diene**: A conjugated diene has alternating double and single bonds. In this case, the two double bonds in 1,3-butadiene are separated by a single bond, which fits the definition of a conjugated diene.
- **Cumulated Diene**: This type has two double bonds that share a common atom (e.g., C=C=C). This does not apply to 1,3-butadiene.
- **Isolated Diene**: This type has double bonds separated by more than one single bond. Again, this does not apply to 1,3-butadiene.

### Conclusion
1,3-butadiene is an example of a **conjugated diene** because it has two double bonds that are separated by a single bond.

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