Chapter 19, Problem 40QAP

Interpretation Introduction

Interpretation: The reason for diamagnetic nature of ${\text{[Co(NH}}_3{\text{)}}_{\text{6}}{}^{3+}\text{]}$ and paramagnetic nature of ${\text{[CoF}}_{\text{6}}{}^{\text{3-}}]$ should be determined.

Concept introduction: A transition metal cation has no outer s- electrons available for bonding, rather the inner d -electrons (in case of 3d transition metal elements) are available for making coordinate bonds with the ligands. Electrons are distributed in the five d- orbitals according to Hund’s rule which results in a maximum number of unpaired electrons.The abbreviated electronic configuration of an element depicts the electronic configuration of the elements which represents the noble gas configuration.