Chapter 20, Problem 20.129CHP

a)

Interpretation Introduction

Interpretation:

The structure of two isomeric compounds of $\text{Co}{\left({\text{NH}}_{\text{3}}\right)}_{\text{3}}{\left({\text{NO}}_{\text{2}}\right)}_{\text{3}}$ has to be drawn.

Concept Introduction:

Coordination compounds: The compounds having coordination covalent bonds which form when metal ions react with polar molecules or anions.

Isomerism: Isomers are compounds with same molecular formula with different arrangements of atoms.

• Structural isomers: molecules have same molecular formula but different bonding arrangements of atoms. It is classified into coordination isomer (occurs by exchanging a coordinated ligand and the counter-ions) and linkage isomers (ligand attached through different atoms to the metal).
• Stereoisomers: differ in their spatial arrangement of atoms.

Stereoisomer: The same molecular formula but different with the arrangements of atoms around the metal ion. The Ligands are arranged differently in coordination compounds.

Geometric isomers: stereoisomers that cannot be interconverted without breaking the chemical bonds.

b)

Interpretation Introduction

Interpretation:

The chemical formula of the third compound has to be predicted.

Concept Introduction:

Coordination compounds: The compounds having coordination covalent bonds which form when metal ions react with polar molecules or anions.

Isomerism: Isomers are compounds with same molecular formula with different arrangements of atoms.

• Structural isomers:  have same molecular formula but different bonding arrangements of atoms. It is classified into coordination isomer (occurs by exchanging a coordinated ligand and the counter-ions) and linkage isomers (ligand attached through different atoms to the metal).
• Stereoisomers: differ in their spatial arrangement of atoms.

Stereoisomer: The same molecular formula but different with the arrangements of atoms around the metal ion. The Ligands are arranged differently in coordination compounds.

Geometric isomers: stereoisomers that cannot be interconverted without breaking the chemical bonds.