Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074



Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

A coordination compound has the formula [Co(en)2Cl2]Cl (en = ethylenediamine, H2NCH2CH2NH2). What types of isomerism (geometric isomerism, optical isomerism, structural isomerism) are possible with this formula? Identify all possible answers.

Interpretation Introduction

Interpretation: The isomers possible in [Co(en)2Cl2]Cl has to be determined.

Concept introduction:

Geometry of coordination compounds: The study of geometry of the coordination compound helps in understanding the physical and chemical property of the compound.

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.

Optical isomers: Optical isomers are non-superimposable mirror images.

Plane-polarized light: Light that oscillates in a single plane.


Each ethylenediamine ligand forms two coordination bonds with metal ions to form a complex.


A pair of geometric isomer can be drawn; where the two ethylenediamine ligands lie on the plane and two chloride ligands located trans- (opposite) to each other and adjacent (cis) to each other in the octahedral structure.

The ethylenediamine is a bidentate ligand, where each ligand (gives rise to two coordinate bond) bonded to metal ion...

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