Question

Which one of the following complexes is not expected to exhibit isomerism?

• A. \( [Ni(NH_3)_6]^{2+} \)
• B. \( [Pt(NH_3)_6]^{2+} \)
• C. \( [Ni(NH_3)_6]Cl_2 \)
• D. \( [Pt(NH_3)_6]Cl_2 \)

Hint:

Octahedral complexes with symmetrically arranged ligands usually do not exhibit isomerism.

Answer 1

The Correct Option is C

The complex \( [Ni(NH_3)_6]Cl_2 \) does not exhibit isomerism because it is a simple octahedral complex without any possibility of geometric or optical isomerism due to the symmetry of the ligands.

Step 2: Conclusion.
The complex \( [Ni(NH_3)_6]Cl_2 \) is the one that does not exhibit isomerism, corresponding to option (c).