Question

Which of the following do not show geometrical isomerism? (Assume all ligands are unidentate)

• A. Square planar [MXL\(_3\)]
• B. Square planar [MX\(_2\)L\(_2\)]
• C. Octahedral [MX\(_2\)L\(_4\)]
• D. Octahedral [MX\(_3\)L\(_3\)]

Hint:

Geometrical isomerism is most commonly observed in square planar and octahedral complexes, particularly when there are different types of ligands that can be arranged in different positions.

Answer 1

The Correct Option is D

Step 1: Understanding Geometrical Isomerism
Geometrical isomerism occurs when there are different spatial arrangements of ligands around a central metal ion.
This is usually observed in square planar and octahedral complexes.
Step 2: Analyzing the Options
In option (a) [MXL\(_3\)], a square planar complex with three identical ligands and one different ligand can show cis-trans isomerism, which is geometrical isomerism.

In option (b) [MX\(_2\)L\(_2\)], a square planar complex with two identical ligands and two other identical ligands can show