Chapter 9, Problem 9D.7E

(a)

Interpretation Introduction

Interpretation:

The electronic configuration and the number of unpaired electrons in ${\left[\text{Co}{\left(\text{en}\right)}_{\text{3}}\right]}^{\text{3+}}$ octahedral complex in strong field ligands have to be given.

Concept Introduction:

Spectrochemical series:

A Spectrochemical series is a list of ligands in the order of ligand strength and a list of metal ion based on oxidation number.  In crystal field theory ligands modify the difference in energy between the d orbitals $\left(\text{Δ}\right)$ called the ligand field splitting parameter for ligands which is mainly reflected in differences in color of similar metal ligand complexes.

Series of ligands from weak field to strong field is,

  $\begin{array}{l}{\text{I}}^{\text{-}}{\text{<Br}}^{\text{-}}{\text{<S}}^{\text{2-}}{\text{<SCN}}^{\text{-}}{\text{<Cl}}^{\text{-}}{\text{<N}}_{\text{3}}{}^{\text{-}}{\text{<F}}^{\text{-}}{\text{<NCO}}^{\text{-}}{\text{<OH}}^{\text{-}}{\text{<C}}_{\text{2}}{\text{O}}_{\text{4}}{}^{\text{-}}{\text{<O}}^{\text{2-}}\\ {\text{<H}}_{\text{2}}{\text{O<NCS}}^{\text{-}}{\text{<CH}}_{\text{3}}{\text{CN<gly<py<NH}}_{\text{3}}{\text{<bipy<NO}}_{\text{2}}{}^{\text{-}}{\text{<PPH}}_{\text{3}}{\text{<CN}}^{\text{-}}\text{<CO}\end{array}$

(b)

Interpretation Introduction

Interpretation:

The electronic configuration and the number of unpaired electrons in ${\left[\text{Mn}{\left(\text{CN}\right)}_{\text{6}}\right]}^{\text{3-}}$ octahedral complex in strong field ligands have to be given.

Concept Introduction:

Refer to part (a).