---
type: "Chapter"
knowledge_type: "chapter"
entity_type: "chapter"
id: "66def83b3f8b4e9e69bda4b2"
title: "Coordination Compounds"
board: "CBSE"
curriculum: "CBSE"
class: "Class 12"
subject: "Chemistry"
book: "Chemistry - I"
chapter: "Coordination Compounds"
chapter_slug: "coordination-compounds"
canonical_url: "https://www.edzy.ai/cbse-class-12-chemistry-chemistry-i-coordination-compounds"
markdown_url: "https://www.edzy.ai/okf/chapter/cbse-class-12-chemistry-chemistry-i-coordination-compounds.md"
source_type: "examSubjectBookChapter"
source_id: "66def83b3f8b4e9e69bda4b2"
source_pdf: "https://edzy-ai.s3.ap-south-1.amazonaws.com/edzy-express-ts/6bb4610d-9814-4204-8210-25c8316ca965.pdf"
source: "Edzy"
version: 1
last_updated: "2026-06-20"
---

# Coordination Compounds

Coordination compounds represent an important area in modern inorganic chemistry where transition metals form complex compounds by sharing electrons with anions or neutral molecules. These compounds play vital roles in biological systems and various industrial applications.

---

## Knowledge Snapshot

| Field | Details |
| :--- | :--- |
| Class | Class 12 |
| Subject | Chemistry |
| Book | Chemistry - I |
| Chapter | Coordination Compounds |
| Pages | 118-140 |

---

## Chapter Summary

### Short Summary
Coordination compounds are complex structures composed of metal and ligands, crucial in various biochemical and industrial processes.

### Detailed Summary
This chapter discusses the nature and structure of coordination compounds, emphasizing their significance in inorganic chemistry. Key aspects include the postulates of Werner’s theory, the terminology related to coordination compounds, and their applications in fields such as medicinal chemistry and industrial processes. The chapter also outlines the bonding theory and types of isomerism present in these compounds. Alfred Werner's contributions to the understanding of coordination complexes are highlighted, focusing on primary and secondary valences, and spatial arrangements of ligands around metal ions.

---

## Topic-Wise Explanation

### Werner’s Theory of Coordination Compounds
Werner’s theory introduced the concepts of primary and secondary valences of metal ions, providing a framework for understanding the structure of coordination compounds.

### Definitions of Important Terms Pertaining to Coordination Compounds
Key terms include coordination entity, central atom/ion, ligand, coordination number, oxidation number, and more.

### Nomenclature of Coordination Compounds
Rules for naming coordination compounds, including the identification of ligands and metal ions are essential in chemistry. Identifying prefixes and oxidation states is also covered.

### Isomerism in Coordination Compounds
Different types of isomerism, including structural and spatial (geometric and optical), play a significant role in the properties of coordination compounds.

### Bonding in Coordination Compounds
The bonding theories, including Valence Bond and Crystal Field theories, explain the nature of metal-ligand interactions within coordination compounds.

### Importance and Applications of Coordination Compounds
Applications in biological systems, industrial processes, and other areas reinforce the importance of coordination compounds in daily life.

---

## Core Ideas

| Idea | Explanation |
| :--- | :--- |
| Coordination Compounds | Complexes formed by transition metals with ligands, critical in various chemical processes. |

---

## Key Concepts

| Concept | Meaning |
| :--- | :--- |
| Ligand | A molecule or ion that binds to a metal atom in a coordination complex. |

---

## Important Points for Revision

* Coordination compounds involve transition metals and ligands.
* Alfred Werner proposed the theory of coordination compounds.
* Primary valences correspond to ionisable linkages.
* Secondary valences correspond to non-ionisable linkages.
* Coordination number indicates the number of ligands attached to the metal.
* The arrangement of ligands around the metal is called coordination geometry.
* Different isomers can exist for the same coordination compound.
* Coordination compounds play significant roles in biological processes.
* Applications include electroplating and dyeing in industry.

---

## Practice Questions

### Short Answer Questions
1. Define coordination compound.
2. What are ligands?
3. Describe primary and secondary valences.
4. What is coordination number?
5. Name one application of coordination compounds.

### Long Answer Questions
1. Explain the postulates of Werner’s theory of coordination compounds.
2. Discuss various types of isomerism in coordination compounds.
3. Describe the bonding theories applicable to coordination compounds.

---

## Related Concepts

* Coordination Chemistry
* Transition Metals
* Bonding Theories

---

## Source Attribution

| Field | Value |
| :--- | :--- |
| Source | Edzy |
| Reference Type | examSubjectBookChapter |
| Reference ID | 66def83b3f8b4e9e69bda4b2 |
| Canonical URL | https://www.edzy.ai/cbse-class-12-chemistry-chemistry-i-coordination-compounds |
| Markdown URL | https://www.edzy.ai/okf/chapter/cbse-class-12-chemistry-chemistry-i-coordination-compounds.md |