Co-ordination compounds `Pt(NH_3)_3 (NCS)] and [Pt(NH_3)_3 (SCN)]` are example of -- isomerism

Options

A. Co-ordination
B. Ionization
C. Linkage
D. Optical

Answer

To determine the type of isomerism exhibited by the coordination compounds \( \text{Pt(NH}_3\text{)}_3(\text{NCS}) \) and \( \text{Pt(NH}_3\text{)}_3(\text{SCN}) \), we can follow these steps:

### Step 1: Identify the Coordination Compounds
We have two coordination compounds:
1. \( \text{Pt(NH}_3\text{)}_3(\text{NCS}) \)
2. \( \text{Pt(NH}_3\text{)}_3(\text{SCN}) \)

### Step 2: Analyze the Ligands
In both compounds, the ligands include:
- Three ammonia (\( \text{NH}_3 \)) molecules, which are neutral ligands.
- One thiocyanate ligand (\( \text{NCS}^- \) or \( \text{SCN}^- \)).

### Step 3: Understand the Bonding
- In \( \text{Pt(NH}_3\text{)}_3(\text{NCS}) \), the thiocyanate ligand is bonded through the nitrogen atom.
- In \( \text{Pt(NH}_3\text{)}_3(\text{SCN}) \), the thiocyanate ligand is bonded through the sulfur atom.

### Step 4: Determine the Type of Isomerism
Since the two compounds have the same formula but differ in the point of attachment of the thiocyanate ligand (either through nitrogen or sulfur), they are classified as linkage isomers.

### Final Answer
The coordination compounds \( \text{Pt(NH}_3\text{)}_3(\text{NCS}) \) and \( \text{Pt(NH}_3\text{)}_3(\text{SCN}) \) are examples of **linkage isomerism**.

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