Chapter 22.3, Problem 2CP

Interpretation Introduction

Interpretation:

The metal ionsthatcan form both low and high spin complexes from the given metal ionsareto be determined.

Concept introduction:

Ligands that cause a high degree of splitting among the $d$ orbital energy levels produce strong magnetic fields and low spin complexes are strong-field ligands. Weak-field ligands, on the other hand, cause small degree of splitting among the $d$ orbital energy levels and result in high spin complexes.

The unpaired spin number in transition metal ions can be determined by their magnetic values as per the crystal field splitting energy. But for a clear distinction between low and high spin complexes, a minimum of three $d$ electrons are required.