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Coordination Compounds

Maharashtra Board · Class 12 · Chemistry

Quick revision notes for Coordination Compounds — Maharashtra Board Class 12 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

44 questions25 flashcards5 concepts

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Key Topics to Revise

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

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Full Notes

Key Concepts

The coordination sphere consists ofLigands are electronCoordination number equals the numberWerner proposed that metals have primaryKey rules

Frequently Asked Questions

What are the important topics in Coordination Compounds for Maharashtra Board Class 12 Chemistry?
Coordination Compounds covers several key topics that are frequently asked in Maharashtra Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Coordination Compounds — Maharashtra Board Class 12 Chemistry?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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