Chapter 20, Problem 48E

Interpretation Introduction

Interpretation: All the geometrical isomers of ${\text{Pt(CN)}}_{\text{2}}{\text{Br}}_{\text{2}}{\left({\text{H}}_2\text{O}\right)}_{\text{2}}$ are to be drawn. The optical isomer is to be identified from these isomers. The structure of this optical isomer is to be drawn.

Concept introduction: In geometrical isomerism, atoms or group of atoms are arranged at different positions around a bond. The following are the conditions for the optically active compounds,

• The compound should not have plane symmetry.
• The compound should not have center of symmetry.
• The mirror image of the compound should be non-superimposable.

To determine: All the geometrical isomers of ${\text{Pt(CN)}}_{\text{2}}{\text{Br}}_{\text{2}}{\left({\text{H}}_2\text{O}\right)}_{\text{2}}$; the optical isomer from these isomers; the structure of this optical isomer.