A compound containing two-OH groups attached with same carbon dehydrates easily, but with which on of the following is its stable ?

Options

A. `CH_(3)-`
B. `H_(3) C-CH_(2) -`
C. `Cl_(3) C-`
D. None of these

Answer

To solve the question regarding the stability of a compound with two -OH groups attached to the same carbon, we will analyze the factors affecting the stability of such compounds.

### Step-by-Step Solution:

1. **Understanding the Structure**:
- The compound in question has two -OH (hydroxyl) groups attached to the same carbon atom. This structure is known as a geminal diol.

2. **Dehydration of Geminal Diols**:
- Geminal diols are known to dehydrate easily to form carbonyl compounds (C=O). This occurs because the presence of two hydroxyl groups on the same carbon creates significant repulsion between the lone pairs of electrons on the oxygen atoms.

3. **Analyzing Stability Factors**:
- When two -OH groups are present on the same carbon, the increased lone pair-lone pair (Lp-Lp) repulsion destabilizes the compound, leading to dehydration and the formation of a carbonyl compound.

4. **Evaluating Different Substituents**:
- We need to evaluate the stability of the geminal diol with different substituents:
- **Case 1: CH3OHCH3**: This compound will also dehydrate easily as there are no stabilizing factors.
- **Case 2: C2H5OH**: Similar reasoning applies; it will also dehydrate easily.
- **Case 3: CCl3OH**: The presence of chlorine, being highly electronegative, can lead to intramolecular hydrogen bonding. This bonding stabilizes the structure and reduces the tendency to dehydrate.

5. **Conclusion**:
- Among the options provided, the compound with the CCl3 substituent is the most stable due to the formation of intramolecular hydrogen bonds, which counteract the destabilizing effects of the two -OH groups.

### Final Answer:
The compound with the CCl3 substituent is stable, making the correct answer **C (CCl3)**.