Which reactants are involved in Mendius reaction?

Options

A. RCN and `LiAIH_4`
B. RCN and `H_2O //HCI`
C. RCN and `Zn//NH_4Cl`
D. RCN and `SnCI_4//HCI`

Answer

To determine the reactants involved in Mendius reaction, we can break down the process step by step.

### Step-by-Step Solution:

1. **Identify the Reaction Type**:
- Mendius reaction is a reduction reaction where a nitrile is converted to a primary amine.

2. **Identify the Reactants**:
- The main reactants involved in the Mendius reaction are:
- **Aryl cyanide (nitrile)**: This is the compound that contains the cyano group (-C≡N) which will be reduced.
- **Lithium aluminium hydride (LiAlH₄)**: This is a strong reducing agent that provides hydride ions (H⁻) for the reduction process.

3. **Mechanism Overview**:
- The reaction involves a nucleophilic attack by the hydride ion from LiAlH₄ on the carbon atom of the nitrile group.
- This leads to the formation of an intermediate that eventually gets protonated (usually by water) to yield the primary amine.

4. **Final Products**:
- The final product of the reaction is a primary amine, represented as RCH₂NH₂, where R is the aryl group from the aryl cyanide.

### Summary of Reactants:
- Aryl cyanide (nitrile)
- Lithium aluminium hydride (LiAlH₄)