Which of the following compounds is an imine?

Options

A. `Ph - overset(overset(O)(||))(C) - NH_2`
B. `CH_3 - CH_2 - N = CH_2`
C.
D.

Answer

To determine which of the given compounds is an imine, we need to understand the structure of imines. An imine is characterized by the presence of a carbon-nitrogen double bond (C=N), where the nitrogen atom is typically bonded to one or more alkyl or aryl groups.

### Step-by-Step Solution:

1. **Understand the Definition of an Imine**:
- An imine is a compound that contains a functional group with the structure C=N. The nitrogen atom is typically bonded to one or more carbon-containing groups (alkyl or aryl).

2. **Analyze the Given Options**:
- We have four options (A, B, C, and D) to evaluate.

3. **Check Option A**:
- Look for the presence of a C=N bond.
- Option A has a C=O bond (carbonyl), not a C=N bond.
- **Conclusion**: Option A is not an imine.

4. **Check Option B**:
- Look for the presence of a C=N bond.
- Option B shows a C=N bond, with the nitrogen bonded to a hydrogen atom (R group can be hydrogen, alkyl, or aryl).
- **Conclusion**: Option B is an imine.

5. **Check Option C**:
- Look for the presence of a C=N bond.
- Option C does not have a C=N bond; it may have other functional groups.
- **Conclusion**: Option C is not an imine.

6. **Check Option D**:
- Look for the presence of a C=N bond.
- Option D also does not have a C=N bond.
- **Conclusion**: Option D is not an imine.

7. **Final Answer**:
- After evaluating all options, the only compound that qualifies as an imine is **Option B**.

### Summary:
The compound that is an imine among the given options is **Option B**.