The reaction , `RNH_2+CHCl_3+underset(("Ethanolic"))(3KOH)rarrR-overset(+)N-=overset(-)C+ 3KCl+3H_2O` is called

Options

A. Cope reaction
B. Curtius reaction
C. Hoffmann - brmamide reaction
D. Carbylamine reaction

Answer

To determine the name of the reaction given by the equation:

\[ \text{RNH}_2 + \text{CHCl}_3 + 3 \text{KOH (Ethanolic)} \rightarrow \text{R-N} \equiv \text{C} + 3 \text{KCl} + 3 \text{H}_2\text{O} \]

we will analyze the components of the reaction step by step.

### Step 1: Identify the Reactants
The reactants in this reaction are:
- RNH₂ (a primary amine)
- CHCl₃ (chloroform)
- KOH (potassium hydroxide in ethanol)

**Hint:** Recognize that the presence of chloroform and a strong base (KOH) is a key indicator of a specific type of reaction involving amines.

### Step 2: Understand the Reaction Type
This reaction involves the conversion of a primary amine (RNH₂) into a nitrile (R-N≡C) through the use of chloroform and a strong base. The strong base facilitates the deprotonation of the amine, allowing it to react with chloroform.

**Hint:** Look for reactions that involve the formation of a nitrile from an amine and chloroform.

### Step 3: Identify the Mechanism
The mechanism involves the formation of an intermediate that ultimately leads to the formation of a carbylamine (R-N≡C). This type of reaction is known as the carbylamine reaction or isocyanide synthesis.

**Hint:** Recall that the carbylamine reaction is characterized by the formation of isocyanides from amines and chloroform in the presence of a base.

### Step 4: Name the Reaction
Based on the analysis, the reaction is known as the **Carbylamine Reaction**. This is because it involves the formation of a carbylamine (isocyanide) from a primary amine.

**Hint:** Remember that the carbylamine reaction is specifically associated with the transformation of amines to isocyanides using chloroform and a base.

### Final Answer
The reaction is called the **Carbylamine Reaction**.