Co-ordination compounds `[Pt(NH_(3))_(3)(NCS)]` and `[Pt(NH_(3))_(2) Cl_(2)]Cl` are example of ........ Isomerism

Options

A. co-ordination isomerism
B. linkage isomers
C. optical isomerism
D. hydrate isomerism

Answer

To determine the type of isomerism exhibited by the coordination compounds `[Pt(NH3)3(NCS)]` and `[Pt(NH3)2Cl2]Cl`, we can analyze the structure and bonding of these compounds step by step.

### Step 1: Identify the ligands in the coordination compounds
- The first compound is `[Pt(NH3)3(NCS)]`. Here, we have three ammonia (NH3) ligands and one thiocyanate (NCS) ligand.
- The second compound is `[Pt(NH3)2Cl2]Cl`. This compound contains two ammonia (NH3) ligands and two chloride (Cl) ligands.

**Hint for Step 1:** Look at the types of ligands present in the coordination compounds.

### Step 2: Understand the nature of the thiocyanate ligand
- The thiocyanate (NCS) ligand can coordinate to the metal center through either the nitrogen atom (N) or the sulfur atom (S). This property makes it an ambidentate ligand, which can lead to different isomers based on which atom is bonded to the metal.

**Hint for Step 2:** Consider how the thiocyanate ligand can attach to the metal in different ways.

### Step 3: Analyze the isomerism in the first compound
- In the compound `[Pt(NH3)3(NCS)]`, if the thiocyanate ligand is bonded through the nitrogen atom, it is referred to as the N-thiocyanate form. If it is bonded through the sulfur atom, it is called the S-thiocyanate form. This results in two distinct isomers based on the linkage of the thiocyanate ligand.

**Hint for Step 3:** Think about how the bonding of the thiocyanate ligand affects the overall structure of the compound.

### Step 4: Analyze the second compound
- The second compound, `[Pt(NH3)2Cl2]Cl`, does not exhibit linkage isomerism since the ligands (ammonia and chloride) do not have different modes of attachment to the metal. Instead, this compound can exhibit geometric isomerism due to the arrangement of the ligands around the platinum center.

**Hint for Step 4:** Consider how the arrangement of ligands around the metal center can lead to different spatial configurations.

### Step 5: Conclude the type of isomerism
- The first compound `[Pt(NH3)3(NCS)]` exhibits linkage isomerism due to the different ways the thiocyanate ligand can bond to the platinum. The second compound `[Pt(NH3)2Cl2]Cl` does not exhibit linkage isomerism but can show geometric isomerism. However, since the question specifically asks about the first compound, we conclude that both compounds are examples of linkage isomerism.

**Final Answer:** The coordination compounds `[Pt(NH3)3(NCS)]` and `[Pt(NH3)2Cl2]Cl` are examples of linkage isomerism.