Chapter 20, Problem 74AE

(a)

Interpretation Introduction

Interpretation: The optically active isomers of the given compound are to be drawn. Oxidation state of the cobalt ions and the number of unpaired electrons present if the complex is the low spin are to be stated.

Concept introduction: The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.

To determine: The optically active isomers of the given compound.

(b)

Interpretation Introduction

Interpretation: The optically active isomers of the given compound are to be drawn. Oxidation state of the cobalt ions and the number of unpaired electrons present if the complex is the low spin are to be stated.

Concept introduction: The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.

To determine: The oxidation states of cobalt ions in the compound.

(c)

Interpretation Introduction

Interpretation: The optically active isomers of the given compound are to be drawn. Oxidation state of the cobalt ions and the number of unpaired electrons present if the complex is the low spin are to be stated.

Concept introduction: The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.