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: Crystal Field Stabilization Energy (CFSE) Definition.
Crystal Field Stabilization Energy (CFSE) quantifies the stabilization gained by a metal ion when it interacts with a ligand field in a coordination complex. Several factors influence this energy:

Step 2: Determinants of CFSE.
- (A) Ligand Type: The intrinsic nature of the ligand dictates the extent of d-orbital splitting. Stronger field ligands induce greater splitting and, consequently, a higher CFSE.- (B) Metal Ion Charge: An increased positive charge on the metal ion amplifies the electrostatic attraction with ligands, resulting in a greater CFSE.- (C) Transition Series Position: As one progresses along a transition series, the magnitude of d-orbital splitting increases, leading to a higher CFSE.- (D) Complex Geometry: While geometry impacts overall ligand field strength, it is not a direct determinant of the CFSE magnitude.

Step 3: Final Determination.
Therefore, the correct selection comprises factors (A), (B), and (C) only, corresponding to option (1).