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Geometrical isomers are possible for :...

Geometrical isomers are possible for :

A

`CH_(3)CH_(2)-underset(NOH) underset(||)(C)-CH_(2)CH_(3)`

B

`CH_(3)CH_(2)- underset(O) underset(||)(C)-CH_(3)`

C

`CH_(3)CH_(2)- underset(NOH) underset(||)(C)-CH_(3)`

D

`C_(6)H_(5)-underset(O) underset(||)(C)-C_(6)H_(5)`

Text Solution

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The correct Answer is:
To determine which of the given compounds can exhibit geometrical isomerism, we need to analyze the structure of each compound based on the criteria for geometrical isomerism. ### Step-by-Step Solution: 1. **Understanding Geometrical Isomerism**: - Geometrical isomerism (cis-trans isomerism) occurs in compounds with restricted rotation around a double bond or a ring structure. For geometrical isomers to exist, there must be two different groups attached to each carbon involved in the double bond. 2. **Analyzing Each Compound**: - **Compound 1: 3-Pentanone Oxyne (C5H9NO)**: - Structure: CH3-CH2-C(=N-OH)-CH3 - The carbon with the double bond (C=N) has two identical groups (CH3) attached to it. - **Conclusion**: Cannot show geometrical isomerism. - **Compound 2: 2-Butanone Oxyne (C4H7NO)**: - Structure: CH3-CH=C(N-OH)-CH3 - The carbon with the double bond (C=N) has two different groups (CH3 and CH2). - **Conclusion**: Can show geometrical isomerism (cis and trans forms). - **Compound 3: 3-Pentanone Oxyne (C5H9NO)**: - Similar to Compound 1, this compound has identical groups on the carbon with the double bond. - **Conclusion**: Cannot show geometrical isomerism. - **Compound 4: Benzo Phenol (C12H10O)**: - Structure: C6H5-C(=O)-C6H5 - The carbon with the double bond (C=O) has two identical phenyl groups attached to it. - **Conclusion**: Cannot show geometrical isomerism. 3. **Final Conclusion**: - Among the given compounds, only **2-Butanone Oxyne** can exhibit geometrical isomerism. ### Summary of Results: - **Compound 1**: No geometrical isomerism. - **Compound 2**: Yes, geometrical isomerism possible. - **Compound 3**: No geometrical isomerism. - **Compound 4**: No geometrical isomerism.
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