Question

The magnitude of CFSE depends on: (A) The nature of the ligand
(B) The charge on the metal ion
(C) Position of the metal ion in transition series
(D) Geometry of the complex

• A. (A), (B) and (C) only
• B. (B) and (C) only
• C. (A), (B), (C) and (D)
• D. (A) and (D) only

Hint:

CFSE is influenced by the ligand type, the metal ion charge, and the position of the metal ion in the transition series.

Answer 1

The Correct Option is A

Step 1: Understanding CFSE.
The Crystal Field Stabilization Energy (CFSE) is the energy stabilization a metal ion experiences due to the ligand field in a coordination complex. It depends on several factors:

Step 2: Factors Affecting CFSE.
- (A) The nature of the ligand: Different ligands cause different splitting of d-orbitals, affecting the overall CFSE. Strong field ligands cause a larger splitting and higher CFSE. - (B) The charge on the metal ion: The higher the charge on the metal ion, the stronger the electrostatic attraction between the metal and the ligands, leading to a higher CFSE. - (C) The position of the metal ion in the transition series: As we move across the transition series, the d-orbital splitting increases, which leads to higher CFSE. - (D) Geometry of the complex: While geometry influences the overall ligand field strength, it doesn't directly determine the magnitude of CFSE.

Step 3: Conclusion.
Thus, the correct answer is option (1): (A), (B) and (C) only.