Definitions Of Some Important Terms Pertaining To Coordination Compounds
Chapter Name : Coordination Compounds |
Sub Topic Code : 102_12_09_02_01 |
Topic Name : Definitions Of Some Important Terms Pertaining To Coordination Compounds |
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Sub Topic Name : Definitions Of Some Important Terms Pertaining To Coordination Compounds |
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Introduction
A coordination compound is defined using the following terms : • Coordination entity • Central atom/ion • Ligand • Coordination number • Coordination sphere • Coordination polyhedron • Oxidation number of central atom • Homoleptic and heterolyptic complexes .
Pre-Requisites:
Definitions of some important terms pertaining to Coordination Compounds
Activity:
Various different pigments and dyes are made of coordination compounds.
Real Life Question:
Helps in Studies.
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Coordination compounds | They are complex compounds in which the metal atoms are bound to a number of anions or neutral molecules. |
| Coordination entity | It is an assembly which constitutes the central metal atom or ion bounded to other ions or molecules. |
| Central metal/ion | It is the atom/ion to which a fixed number of ions/groups are bound in a definite geometrical arrangement around it. |
| Ligands | They are the ions or molecules bound to the central atom/ion in the coordination entity. |
| Dentistry | It is the number of atoms in a single ligand that bind to the central atom. |
| Coordination number | It is the number of ligand donor atoms to which the metal is directly bonded. |
| Coordination sphere | The central atom/ion and the ligands attached to it are enclosed in square brackets, which is collectively termed as the coordination sphere. |
| Coordination polyhedron | It is the spatial arrangement of the ligand atoms which are directly attached to the central atom/ion. |
| Oxidation number of central atom | It is the charge a central atom carries when all the ligands (and thus the electron pairs donated by them) are removed. |
| Homoleptic complex | It is a complex in which the metal is bound to only one kind of donor groups. |
| Heteroleptic complex | It is a complex in which the metal is bound to more than one kind of donor groups. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| NCERT text book | Read topic 9.5 and 9.6 to understand how the metal atoms and ligands form a coordination entity. |
Real life uses :
Coordination compounds are used in electroplating, textile dyeing.
Places to visit :
Metal extraction industry, Textile dyeing mills.
Practical examples around us
| Examples | Explainations |
|---|---|
| Chlorophyll | It is a coordination compound of magnesium. |
| Hemoglobin | It is a coordination compound of iron. |
What you learn in Theory:
Different terms used while defining a coordination compound.
What you learn in Practice:
Different terms used while defining a coordination compound.