Which of the following compounds will exhibit cis-trans (geometrical ) isomerism ?

Options

A. 1-Butanol
B. 2-Butene
C. 2-Butanol
D. 2-Butyne

Explanation

To determine which of the given compounds will exhibit cis-trans (geometrical) isomerism, we need to analyze the structures of the compounds and check for the presence of a double bond or a ring structure that allows for different spatial arrangements of substituents. Here’s a step-by-step solution:

### Step 1: Identify the Compounds
Assuming we have the following compounds:
1. Butane-1-ol
2. Butene (specifically 1-butene)
3. 2-Butanol
4. 2-Butyne

### Step 2: Draw the Structures
- **Butane-1-ol**: This compound has a straight-chain structure with an -OH group at the end. It does not have a double bond, so it cannot exhibit cis-trans isomerism.

- **Butene (1-butene)**: This compound has a double bond between the first and second carbon atoms. However, since the double bond is at the terminal position, it cannot exhibit cis-trans isomerism.

- **2-Butanol**: This compound has an -OH group on the second carbon of a four-carbon chain. It does not have a double bond, so it cannot exhibit cis-trans isomerism.

- **2-Butyne**: This compound has a triple bond between the second and third carbon atoms. Triple bonds do not allow for cis-trans isomerism, as they do not have the necessary geometry.

### Step 3: Analyze for Cis-Trans Isomerism
Cis-trans isomerism requires:
- A double bond or a ring structure.
- Two different groups attached to each carbon of the double bond.

In this case, only **2-butene** (not listed in the question but implied in the analysis) would exhibit cis-trans isomerism because it has a double bond between the second and third carbon atoms, with two different groups attached.

### Conclusion
Based on the analysis, the compound that would exhibit cis-trans isomerism is **2-butene**. However, since it was not explicitly listed in the question, we conclude that none of the provided compounds exhibit cis-trans isomerism.

### Final Answer
None of the listed compounds exhibit cis-trans isomerism.

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