Chapter 22, Problem 22.27QP

Interpretation Introduction

Interpretation:

Co-ordination number of transition metal atom in complex $\left[Co{\left(en\right)}_2\left(C_2{O}_4\right)\right]Cl{O}_4$ has to be calculated and the correct answer has to be chosen from the following options -

(a) $2$ (b) $3$ (c) $4$ (d) $5$ (e) $6$

Concept introduction:

Complex compounds are primarily formed by transition elements which are d-block elements.  A co-ordination compound is known as a complex compound is made of metal atom/ion and ligand(s).  Ligands are considered as Lewis bases and the central metal atom is Lewis acid.  Ligands donate a pair of electron to metal ion and establishes bonding with metal ion which is known as co-ordinate bond and hence these compounds are named as co-ordination compounds.  The ligands represented inside the square brackets.

Co-ordination number of a central metal atom in its complex compound refers to the number of ligands bonded to central metal atom.