The correct order of intensity of colors of the compounds is:

Question

Canvas Classes · Accepted Answer

Strategy:
 Color intensity in transition metal complexes often correlates with the relaxation of the Laporte selection rule.

Step 1: Analyze transition rules
- Tetrahedral complexes lack a center of symmetry. The lack of an inversion center significantly relaxes the Laporte selection rule (which forbids d-d transitions in purely centrosymmetric environments), making tetrahedral complexes intensely colored.
- Octahedral complexes have a center of symmetry, making d-d transitions Laporte forbidde

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