Chapter 20, Problem 70QRT

(a)

Interpretation Introduction

Interpretation:

All possible geometric isomers for $[{\text{Ni(NH}}_{\text{3}}{\text{)}}_{\text{4}}{\text{Cl}}_{\text{2}}]$ has to be drawn.

Concept Introduction:

Geometric isomerism is a type of isomerism which is said by the position of the ligand in the complex.  In case of tetrahedral complex, geometric isomerism is not possible as all the corners are equivalent.  This isomerism is possible in case of square planar and octahedral complexes.  If the two same ligands are present adjacent to each other means it is known as cis isomer and if they are present opposite to each other means it is known as trans isomer.

(b)

Interpretation Introduction

Interpretation:

All possible geometric isomers for $[{\text{Pt(NH}}_{\text{3}}{\text{)}}_{\text{2}}\text{(SCN)Br}]$ has to be drawn.

Concept Introduction:

Refer part (a).

(c)

Interpretation Introduction

Interpretation:

All possible geometric isomers for ${[{\text{Co(en)Cl}}_{\text{4}}]}^{-}$ has to be drawn.

Concept Introduction:

Refer part (a).