Which of the following compounds reacts with `NaCNBH_(3)`?

Options

A. a.`Me- CH=NH`
B. b.`Me_(2)C=N-Me`
C. c.
D. d.`PhNO_(2)`

Explanation

To determine which of the given compounds reacts with sodium cyanoborohydride (NaCNBH₃), we need to understand the nature of the compounds and the reactivity of NaCNBH₃. Sodium cyanoborohydride is primarily used for the reduction of imines to amines.

### Step 1: Identify the nature of sodium cyanoborohydride (NaCNBH₃)
Sodium cyanoborohydride is a reducing agent that is particularly effective in reducing imines to amines. An imine has the general structure R1C=NR2, where R1 and R2 can be hydrogen or alkyl groups.

### Step 2: Analyze the options
We need to analyze the given options to identify which ones contain imines.

1. **Option A: MeCH=NH (an imine)**
- This compound has a carbon-nitrogen double bond, making it an imine. It can react with NaCNBH₃ to form a primary amine.

2. **Option B: Me₂C=NH (an imine)**
- This compound also has a carbon-nitrogen double bond and is an imine. It can react with NaCNBH₃ to form a secondary amine.

3. **Option C: Benzyl alcohol (not an imine)**
- This compound does not contain a carbon-nitrogen double bond, so it cannot react with NaCNBH₃.

4. **Option D: Nitrobenzene (not an imine)**
- Nitrobenzene contains a nitro group (NO₂) and does not have any carbon-nitrogen double bond, so it cannot react with NaCNBH₃.

### Step 3: Conclusion
Based on the analysis:
- **Option A (MeCH=NH)** and **Option B (Me₂C=NH)** are the compounds that can react with sodium cyanoborohydride because they are imines.
- **Option C (Benzyl alcohol)** and **Option D (Nitrobenzene)** do not react with NaCNBH₃ as they are not imines.

### Final Answer
The compounds that react with NaCNBH₃ are **A and B**.

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