Chapter 19, Problem 67E

Interpretation Introduction

Interpretation: The wavelength of complex ion ${{\text{[CoBr}}_{\text{6}}\text{]}}^{\text{4-}}$ longer or shorter than $\text{3}\text{.4}\times {\text{10}}^{\text{-6}}$ m needs to be determined.

Concept Introduction:

Crystal field theory is the theory given to explain the bonding in the coordination complexes. As ligand approaches towards the metal ion, the d-orbital of metal ion divide according to the energy of metal ion. On the basis of energy and degeneracy, the d-orbital can be classified as ${\text{t}}_{\text{2g}}$ and ${\text{e}}_{\text{g}}$ orbitals. The electrons will fill according to their energy levels.

The spectrochemical series can be defined as the series of ligands in order of their ability of splitting the d-orbitals.

It can be used to study the light absorbed by the complexes as it shows the ligands from strong field to weak field.