Which of the following is not a nitro derivatives?

Options

A. `C_6H_5-NO_2`
B.
C. `CH_3-underset(O)underset(darr)N=O`
D. `CH_3CH_2-O-N=O`

Answer

To determine which of the given compounds is not a nitro derivative, we need to analyze each option based on the presence of the nitro group (NO2) and the bonding structure.

### Step-by-Step Solution:

1. **Understanding Nitro Derivatives**:
- A nitro derivative contains a nitro group (NO2) directly bonded to a carbon atom. If the carbon is bonded to the nitrogen of the NO2 group, it is classified as a nitro derivative.
- If the carbon is bonded to the oxygen of the NO2 group, it is classified as a nitrito derivative (ONO).

2. **Analyzing the Options**:
- **Option 1: C6H5NO2**
- Here, C6H5 represents a benzene ring, and it is bonded to the NO2 group. The carbon in the benzene ring is bonded to the nitrogen of the NO2 group.
- Conclusion: This is a nitro derivative.

- **Option 2: OH C6H5NO2**
- Similar to Option 1, this compound also has a benzene ring (C6H5) bonded to the NO2 group. The presence of the OH group does not change the fact that the carbon is bonded to the nitrogen.
- Conclusion: This is also a nitro derivative.

- **Option 3: CH3N=O=O**
- In this compound, the carbon (from CH3) is bonded to a nitrogen atom which is then bonded to two oxygen atoms (NO2). The carbon is bonded to the nitrogen of the nitro group.
- Conclusion: This is a nitro derivative.

- **Option 4: CH3O-NO2**
- In this case, the carbon from CH3 is bonded to the oxygen of the NO2 group (as indicated by the structure ONO). This means that the carbon is not bonded to the nitrogen.
- Conclusion: This is a nitrito derivative, not a nitro derivative.

3. **Final Answer**:
- The compound that is not a nitro derivative is **Option 4: CH3O-NO2**.