Due to the presence of ambidenate ligands coordination compounds show isomerism. Palladium complexes of the type `[Pd(C_(6)H_(5))_(2)(SCN)_(2)]` & `[Pd(C_(6)H_(5))_(2)(NCS)_(2)]` are

Options

A. linkage isomers
B. coordination isomers
C. ionisation isomers
D. geometrical isomers

Answer

To determine the type of isomerism exhibited by the palladium complexes `[Pd(C₆H₅)₂(SCN)₂]` and `[Pd(C₆H₅)₂(NCS)₂]`, we need to analyze the ligands and their coordination to the metal center.

### Step-by-Step Solution:

1. **Identify the Ligands**:
- In the first complex, `[Pd(C₆H₅)₂(SCN)₂]`, the ligand SCN (thiocyanate) can coordinate through sulfur (S) or nitrogen (N).
- In the second complex, `[Pd(C₆H₅)₂(NCS)₂]`, the ligand NCS (isothiocyanate) coordinates through nitrogen (N).

2. **Understand Ambidentate Ligands**:
- SCN is an ambidentate ligand, meaning it can bind to the metal through more than one atom (S or N). This property allows for different arrangements of the same ligands around the metal center.

3. **Determine the Isomerism Type**:
- The two complexes differ only in the coordination site of the thiocyanate ligand. This results in different structural arrangements:
- In `[Pd(C₆H₅)₂(SCN)₂]`, the SCN ligands are coordinated through sulfur.
- In `[Pd(C₆H₅)₂(NCS)₂]`, the NCS ligands are coordinated through nitrogen.
- This type of isomerism, where the same ligands are coordinated through different atoms, is known as **linkage isomerism**.

4. **Conclusion**:
- Since both complexes exhibit linkage isomerism due to the ambidentate nature of the SCN ligand, we conclude that they are linkage isomers.

### Final Answer:
The palladium complexes `[Pd(C₆H₅)₂(SCN)₂]` and `[Pd(C₆H₅)₂(NCS)₂]` are **linkage isomers**.

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