Question

A transition metal M forms 4 homoleptic octahedral coordination compounds, A, B, C, and D of the type [MX\(_6\)]\(^{2-}\) with monodentate ligands a, b, c, and d respectively. These compounds absorb red, blue, yellow, and blue-green light respectively. Which one of the options shows the correct order of decreasing ligand strength?

• A. B \( > \) D \( > \) C \( > \) A
• B. D \( > \) C \( > \) B \( > \) A
• C. A \( > \) C \( > \) D \( > \) B
• D. A \( > \) B \( > \) C \( > \) D

Hint:

The stronger the ligand, the greater the splitting of the d-orbitals and the higher the energy of the light absorbed. Ligands that cause greater splitting absorb light with shorter wavelengths.

Answer 1

The Correct Option is A