Which carbonyl compound will not give addition reaction with water ?

Options

A. `C Cl_3CHO`
B. `CF_3CHO`
C. `CH_3-overset(O)overset(||)(C )-CH_3`
D. `CF_3-overset(O)overset(||)(C )-CF_3`

Answer

To determine which carbonyl compound will not undergo an addition reaction with water, we need to analyze the nature of the carbonyl compounds given in the options. The addition reaction with water typically occurs with carbonyl compounds (like aldehydes and ketones) where the carbon atom of the carbonyl group can be attacked by the nucleophile (water).

### Step-by-Step Solution:

1. **Identify the Carbonyl Compounds**:
Let's consider the four carbonyl compounds provided in the question. For our analysis, we will denote them as:
- Compound A: Cl3C=O (trichloroacetaldehyde)
- Compound B: F3C=O (trifluoroacetaldehyde)
- Compound C: CH3C=O (acetone)
- Compound D: (any other carbonyl compound)

2. **Understanding Electrophilicity**:
The carbonyl carbon is electrophilic due to the polarization of the C=O bond. The carbon atom has a partial positive charge, making it susceptible to nucleophilic attack by water.

3. **Analyze the Substituents**:
- **Compound A (Cl3C=O)**: The three chlorine atoms are highly electronegative and exhibit a strong -I (inductive) effect, which stabilizes the positive charge on the carbon during the addition reaction. Therefore, this compound can undergo addition with water.
- **Compound B (F3C=O)**: Similar to compound A, the three fluorine atoms are even more electronegative than chlorine and will also stabilize the positive charge on the carbon, allowing for addition with water.
- **Compound C (CH3C=O)**: The methyl groups (CH3) are electron-donating (+I effect) and do not stabilize the positive charge on the carbon during the addition reaction. This makes the addition reaction less favorable, and thus, this compound is likely to resist addition with water.
- **Compound D**: Without specific information about this compound, we cannot analyze it.

4. **Conclusion**:
Based on the analysis, **Compound C (acetone)** is the carbonyl compound that will not give an addition reaction with water due to the destabilizing effect of the electron-donating methyl groups.

### Final Answer:
**The carbonyl compound that will not give an addition reaction with water is CH3C=O (acetone).**