Coordination compounds class 12 notes

Coordination compounds class 12 notes | Master Notes

Co-ordination Compounds Class 12 Notes: Master Your Understanding of Coordination Compounds

Welcome to the comprehensive master notes on “Coordination Compounds” for Class 12 students! In this meticulously crafted study material, we delve deep into the fascinating world of coordination compounds, exploring their structure, bonding, properties, and applications. Coordination compounds are a class of chemical compounds in which a central metal atom or ion is bonded to a number of surrounding ligands. Ligands are atoms, molecules, or ions that can donate one or more pairs of electrons to the central metal atom. The central metal atom and the ligands form a coordination sphere, which is held together by coordinate covalent bonds.

Co ordination compounds are also known as co ordination complexes. They are a diverse and important class of compounds, with applications in catalysis, medicine, and materials science.

Examples of co ordination compounds:

  • [CoCl3(NH3)3] (hexamminecobalt(III) chloride)
  • [Fe(CN)6]4- (hexacyanoferrate(II) ion)
  • [Ni(CO)4] (tetracarbonylnickel)
  • [PtCl4]2- (tetrachloroplatinate(II) ion)
  • [Cu(H2O)6]2+ (hexaaquacopper(II) ion)

Properties of co ordination compounds:

  • Coordination compounds are often colored. The color of a coordination compound is due to the absorption of certain wavelengths of light by the d-electrons of the central metal atom.
  • Coordination compounds are often soluble in water. The solubility of a coordination compound depends on the charge of the complex and the nature of the ligands.
  • Coordination compounds can form isomers. Isomers are compounds with the same molecular formula but different structures.


Co ordination compounds are a crucial aspect of inorganic chemistry that plays a vital role in understanding the coordination and interactions of metal ions with ligands. These compounds form an integral part of various biological processes, industrial applications, and environmental processes. Thus, a solid grasp of co-ordination compounds is essential for a holistic understanding of chemistry.

Coordination compounds class 12 notes

Key Topics Covered

1. Introduction to Co ordination Compounds: Understand the fundamental concepts and historical background of co-ordination compounds, including coordination number, central metal atom, ligands, and coordination sphere.

2. Nomenclature and Isomerism: Explore the systematic nomenclature rules for co-ordination compounds, and gain insights into various types of isomerism, such as structural isomerism, geometric isomerism, and optical isomerism.

3. Werner’s Co ordination Theory: Learn about the pioneering work of Alfred Werner in the co-ordination chemistry field, including his co-ordination number concept and the postulates of the coordination theory.

4. Bonding in Co-ordination Compounds: Dive into the intricate bonding theories that explain the formation of co-ordination compounds, including Valence Bond Theory (VBT) and Crystal Field Theory (CFT).

5. Stability and Color of Coordination compounds: Discover the factors influencing the stability of co-ordination complexes and the correlation between the color of coordination compounds and the electronic transitions.

6. Co-ordination Compounds in Biochemistry: Explore the significance of co-ordination compounds in biological systems, focusing on metalloproteins, metalloenzymes, and metal-ion transport.

7. Applications of Co-ordination Compounds: Understand the diverse applications of co-ordination compounds in industries, such as catalysis, medicine, agriculture, and materials science.

Why Choose These Master Notes:
Comprehensive Coverage: These notes provide an in-depth analysis of each topic, covering all essential concepts in coordination compounds.
Easy-to-Understand Language: The notes are written in a clear and concise manner, making complex ideas easier to grasp.
Illustrative Diagrams: Visual aids and diagrams accompany the explanations, facilitating better understanding and retention.
Exam-Oriented: Designed with Class 12 board exams in mind, these notes are tailored to help you excel in your examinations.
Whether you are a student aiming for top grades or someone curious about the fascinating world of coordination compounds, these master notes are your ultimate resource. Enhance your knowledge, strengthen your concepts, and unlock the secrets of coordination compounds with this all-encompassing study material. Happy learning!

About Author :-

Mr. Dinesh Kumar

S.NO Name of Chapter View
1. Solid State Click
2.Solution Click
4.Chemical KineticsClick
5.Surface ChemistryClick
6.General Principles and Processes of Isolation of ElementsClick
7.The p-Block ElementsClick
8.The d-and f-Block ElementsClick
9.Coordination CompoundsClick
10.Haloalkanes and HaloarenesClick
11.Alcohols, Phenols and EthersClick
12.Aldehydes, Ketones and Carboxylic AcidsClick
16.Chemistry in Everyday LifeClick



  1. Hi administrator, You always provide great examples and real-world applications, thank you for your valuable contributions.

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