Chapter 9 of 16
Syllabus
Coordination Compounds — Syllabus
Maharashtra Board · Class 12 · Chemistry
What Coordination Compounds covers in Maharashtra Board Class 12 Chemistry: 4 topics, for the 2026-27 session.
44 questions25 flashcards5 concepts
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4 Topics · Maharashtra Board Class 12 Chemistry · 2026-27
Topics in Coordination Compounds
1
Basic Concepts and Terminology
- Central metal atom/ion: Usually electron-deficient, acts as Lewis acid
- Ligands: Electron donors (Lewis bases) that form coordinate bonds
- Coordination sphere: [Metal + ligands] enclosed in square brackets
2
Types of Ligands
- Monodentate ligands: One donor atom (Cl⁻, NH₃, H₂O, CN⁻)
- Polydentate ligands: Multiple donor atoms (en, EDTA, ox²⁻)
- Bidentate: Two donor atoms (ethylenediamine, oxalate)
3
Coordination Number and Oxidation State
- Coordination number = number of donor atoms directly bonded to metal
- Common coordination numbers: 2, 4, 6 (most common)
- Oxidation state calculation: Charge on complex = OS of metal + charges on ligands
4
IUPAC Nomenclature
- Order: Ligands first (alphabetically), then metal with oxidation state
- Anionic ligands: -ide becomes -o, -ate becomes -ato
- Prefixes: di-, tri-, tetra-, penta-, hexa- for multiple same ligands
Key Concepts
The coordination sphere consists ofLigands are electronCoordination number equals the numberWerner proposed that metals have primaryKey rules
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What are the important topics in Coordination Compounds for Maharashtra Board Class 12 Chemistry?
Key topics in Coordination Compounds include Basic Concepts and Terminology, Types of Ligands, Coordination Number and Oxidation State, IUPAC Nomenclature. Study these first, then practise questions on each for the Maharashtra Board Class 12 board exam.
How should I revise Coordination Compounds for the Maharashtra Board Class 12 board exam?
Learn the core ideas first, then work through the 44 practice questions on Coordination Compounds. Revise definitions regularly and use flashcards for quick recall before the exam.
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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