Chapter 20, Problem 49E

(a)

Interpretation Introduction

Interpretation: The given crystal field diagrams are to be matched with the correct complex ions.

Concept introduction: Weak field ligand that has small crystal field splitting energy gives high spin due to presence of maximum unpaired electrons in lower energy ${\text{t}}_{\text{2g}}$ orbitals and higher energy orbitals.

Strong field ligand that has large crystal field splitting energy gives low spin due to the presence of maximum paired electrons in lower energy ${\text{t}}_{\text{2g}}$ orbitals.

To determine: If the given crystal field diagram corresponds to $\text{Cr}{\left({\text{NH}}_{\text{3}}\right)}_{\text{5}}{\text{Cl}}^{2+},\text{Co}{\left({\text{NH}}_{\text{3}}\right)}_{\text{4}}{\text{Br}}_2{}^{+}$ ion or $\text{Fe}{\left({\text{H}}_{\text{2}}\text{O}\right)}_{\text{6}}{}^{3+}$ ion.

(b)

Interpretation Introduction

Interpretation: The given crystal field diagrams are to be matched with the correct complex ions.

Concept introduction: Weak field ligand that has small crystal field splitting energy gives high spin due to presence of maximum unpaired electrons in lower energy ${\text{t}}_{\text{2g}}$ orbitals and higher energy orbitals.

Strong field ligand that has large crystal field splitting energy gives low spin due to the presence of maximum paired electrons in lower energy ${\text{t}}_{\text{2g}}$ orbitals.

To determine: If the given crystal field diagram corresponds to $\text{Cr}{\left({\text{NH}}_{\text{3}}\right)}_{\text{5}}{\text{Cl}}^{2+},\text{Co}{\left({\text{NH}}_{\text{3}}\right)}_{\text{4}}{\text{Br}}_2{}^{+}$ ion or $\text{Fe}{\left({\text{H}}_{\text{2}}\text{O}\right)}_{\text{6}}{}^{3+}$ ion.

(c)

Interpretation Introduction

Interpretation: The given crystal field diagrams are to be matched with the correct complex ions.

Concept introduction: Weak field ligand that has small crystal field splitting energy gives high spin due to presence of maximum unpaired electrons in lower energy ${\text{t}}_{\text{2g}}$ orbitals and higher energy orbitals.

Strong field ligand that has large crystal field splitting energy gives low spin due to the presence of maximum paired electrons in lower energy ${\text{t}}_{\text{2g}}$ orbitals.

To determine: If the given crystal field diagram corresponds to $\text{Cr}{\left({\text{NH}}_{\text{3}}\right)}_{\text{5}}{\text{Cl}}^{2+},\text{Co}{\left({\text{NH}}_{\text{3}}\right)}_{\text{4}}{\text{Br}}_2{}^{+}$ ion or $\text{Fe}{\left({\text{H}}_{\text{2}}\text{O}\right)}_{\text{6}}{}^{3+}$ ion.