Which of the following compounds will not give haloform reaction?

Options

A. a.alpha-Phenyl ethanol
B. b.Acetophenone
C. c.Ethyl bromide
D. d.`(MeCO)_(2)O`

Explanation

To determine which of the given compounds will not give a haloform reaction, we first need to understand the conditions required for a compound to undergo this reaction.

### Step-by-Step Solution:

1. **Understanding Haloform Reaction**:
- The haloform reaction occurs with compounds that have the structure RCOCH3 (where R can be any alkyl or aryl group). This means that for a compound to undergo the haloform reaction, it must have a methyl ketone (C=O with a CH3 group attached) or a secondary alcohol that can be oxidized to a methyl ketone.

2. **Analyzing the Given Compounds**:
- **Option A: Alpha-Phenyl Ethanol (C6H5-CH(OH)-CH3)**:
- This compound has the structure of a secondary alcohol with a methyl group. It can be oxidized to form a methyl ketone (acetophenone), which can then undergo the haloform reaction. Therefore, it will give a haloform reaction.

- **Option B: Acetophenone (C6H5-CO-CH3)**:
- Acetophenone is a methyl ketone (C=O with a CH3 group). It directly fits the criteria for the haloform reaction. Thus, it will also give a haloform reaction.

- **Option C: Ethyl Bromide (C2H5Br)**:
- Ethyl bromide is an alkyl halide. Under basic conditions, it can be converted to ethanol (C2H5OH), which is a secondary alcohol. This alcohol can then be oxidized to form acetaldehyde (which can further be oxidized to a methyl ketone), allowing it to undergo the haloform reaction. Therefore, it will also give a haloform reaction.

- **Option D: ME(C=O)2 (Dimethyl Ketone or Acetone)**:
- This compound does not have the required structure for the haloform reaction. It lacks the terminal methyl group (C=O with CH3) necessary for the reaction to occur. Hence, it will not give a haloform reaction.

3. **Conclusion**:
- The compound that will not give a haloform reaction is **Option D: ME(C=O)2**.

### Final Answer:
**Option D: ME(C=O)2 will not give a haloform reaction.**