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Which of the following will not form iod...

Which of the following will not form iodoform with `I_2// overset(-)(O)H`?

A

Ethanol

B

Ethanal

C

Isopropyl alcohol

D

Benzyl alcohol

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "Which of the following will not form iodoform with `I_2// overset(-)(O)H`?", we need to understand the conditions required for a compound to give a positive iodoform test. ### Step-by-Step Solution: 1. **Understand the Iodoform Test**: The iodoform test is used to identify the presence of a methyl ketone (a carbonyl group with a methyl group adjacent to it) or ethanol (ethyl alcohol). The general reaction involves the halogenation of the methyl group adjacent to a carbonyl group. 2. **Identify the Necessary Condition**: For a compound to give a positive iodoform test, it must have a methyl group (−CH3) adjacent to a carbonyl group (C=O). This means that compounds with a structure of the form R-CO-CH3 (where R can be any alkyl group) will react positively. 3. **Analyze the Given Options**: Let's consider the options provided in the question: - **Option A**: Ethanol (C2H5OH) - This compound can form iodoform because it can be oxidized to acetaldehyde (which has a methyl group adjacent to a carbonyl). - **Option B**: Isopropyl alcohol (C3H8O) - This compound can also form iodoform because it can be oxidized to acetone (which has a methyl group adjacent to a carbonyl). - **Option C**: Benzyl alcohol (C6H5CH2OH) - This compound does not have a methyl group adjacent to a carbonyl group. Benzyl alcohol cannot be oxidized to a compound that has a methyl ketone structure. 4. **Conclusion**: Based on the analysis, the compound that will not form iodoform with `I2// overset(-)(O)H` is **Benzyl alcohol**. ### Final Answer: Benzyl alcohol will not form iodoform.
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