Chapter 23, Problem 73AE

(a)

Interpretation Introduction

Interpretation: The Lewis structure for dmpe and its comparison with the given ligand is to be determined. The oxidation of $\text{Mo}$ in the given compound and the possible isomers of the given compound is to be determined.

Concept introduction: The Lewis structure represents all bonding and non-bonding electrons surrounding the atoms involved in a molecule. A molecule exhibits a particular geometry in space considering the steric hindrances of the bond pairs and the lone pairs of electron.

The coordination number of metal in a complex is equal to its secondary valency that is the number of ligands attached to the metal and is written inside the coordination sphere.

The oxidation number of central metal in the complex depends on both primary valency and secondary valency of the complex.

In Optical isomerism the two isomers have non superimposable mirror image of each other.

To determine: The Lewis structure of dmpe and it comparison with ethylenediamine as a coordinating ligand.

(b)

Interpretation Introduction

To determine: The oxidation state of $\text{Mo}$ in ${\text{Na}}_{\text{2}}\left[\text{Mo}{\left(\text{CN}\right)}_{\text{2}}{\left(\text{CO}\right)}_{\text{2}}\left(\text{dmpe}\right)\right]$ .

(c)

Interpretation Introduction

To determine: The structure of all the possible isomer of ${\left[\text{Mo}{\left(\text{CN}\right)}_{\text{2}}{\left(\text{CO}\right)}_{\text{2}}\left(\text{dmpe}\right)\right]}^{2-}$ .