Ethylamine is heated with `CS_(2)` in the presence of `Hg CI_(2)` The product formed is .

Options

A. ethanethiol
B. diethyl sulphide
C. ethyl thiocyanate
D. ethyl isothiocyanate

Answer

To solve the question, we need to analyze the reaction between ethylamine and carbon disulfide (CS₂) in the presence of mercuric chloride (HgCl₂). Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the Reactants
The reactants in this reaction are:
- Ethylamine (C₂H₅NH₂)
- Carbon disulfide (CS₂)
- Mercuric chloride (HgCl₂)

### Step 2: Write the Reaction
When ethylamine is heated with carbon disulfide in the presence of mercuric chloride, a reaction occurs that leads to the formation of isothiocyanate.

The reaction can be represented as:
\[ \text{C}_2\text{H}_5\text{NH}_2 + \text{CS}_2 + \text{HgCl}_2 \rightarrow \text{C}_2\text{H}_5\text{NCS} + 2 \text{HCN} + \text{HgS} \]

### Step 3: Identify the Main Product
The main product formed from this reaction is ethyl isothiocyanate, which is represented as:
\[ \text{C}_2\text{H}_5\text{NCS} \]

### Step 4: Additional Products
Along with ethyl isothiocyanate, the reaction also produces hydrogen cyanide (HCN) and mercuric sulfide (HgS) as by-products.

### Step 5: Conclusion
Thus, the product formed when ethylamine is heated with carbon disulfide in the presence of mercuric chloride is ethyl isothiocyanate (C₂H₅NCS).

### Final Answer
The correct answer is ethyl isothiocyanate (C₂H₅NCS).