Chapter 20, Problem 20.87SP

Interpretation Introduction

Interpretation:

The six possible isomers for given square planar $\text{Pd(II)}$ complex with ${\text{2Cl}}^{\text{-}}$ and $2SC{N}^{-}$ should be drawn and labelled depending on isomer classification. 

Concept Introduction:

Isomerism: Two chemical compounds are said to be isomers if they have same number and kind of atoms but different only in their orientation that is structural arrangements.

• Structural or Constitutional isomers: Have same molecular formula but different bonding arrangements of atoms. It is further classified as Linkage and Ionization isomers.
• Stereoisomers: Differ in their spatial arrangement of atoms.

Linkage isomers: The metal bond to ligand via either of two different donor atoms present in ligand. E.g. ${\left[Co{\left(N{H}_3\right)}_5\left(N{O}_2\right)\right]}^{2+}and{\left[Co{\left(N{H}_3\right)}_5\left(ONO\right)\right]}^{2+}$

There are different types of isomerism in which geometric is of one type where the rotation around the atom is restricted like in cis-trans configuration. This is also refereed as cis-trans isomerism.

Diastereoisomers: The stereo isomers of one compound which are not mirror images with each other are referred as diastereoisomers.