Geometrical isomerism is not possible in

Options

A. 2,4-hexadiene
B. benzaldoxime
C. but-2-ene
D. benzophenone oxime

Explanation

To determine which compound does not exhibit geometrical isomerism, we need to analyze the given options based on the criteria for geometrical isomerism.

### Step-by-Step Solution:

1. **Understanding Geometrical Isomerism**:
- Geometrical isomerism occurs in compounds with restricted rotation around a double bond or a ring structure. For geometrical isomers to exist, the compound must have two different groups attached to each carbon of the double bond.

2. **Analyzing Each Compound**:
- **2,4-Hexadiene**:
- Structure: CH2=CH-CH=CH-CH2-CH3
- It has two double bonds and can have different configurations (cis/trans) around these double bonds. Therefore, geometrical isomerism is possible.

- **Benzyl Alcohol (Benzyldo-Oxygen)**:
- Structure: C6H5-CH(OH)-H
- The presence of a double bond between the benzene ring and the hydroxyl group allows for cis/trans configurations. Thus, geometrical isomerism is possible.

- **But-2-ene**:
- Structure: CH3-CH=CH-CH3
- This compound has a double bond between two carbon atoms, each bearing different groups (methyl and hydrogen). Thus, geometrical isomerism is possible.

- **Benzophenone Oxime**:
- Structure: C6H5-C(=NOH)-C6H5
- In this structure, the nitrogen atom is bonded to the same carbon as the hydroxyl group, leading to the same groups being attached to the same carbon. This configuration does not allow for different arrangements (cis/trans) because the groups are identical on the same carbon.

3. **Conclusion**:
- Among the given options, **Benzophenone Oxime** is the compound where geometrical isomerism is not possible due to identical groups attached to the same carbon.

### Final Answer:
**Benzophenone Oxime** is the correct answer as geometrical isomerism is not possible in this compound.

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