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Coordination Compounds

Telangana Open School (TOSS) · Class 12 · Chemistry

Quick revision notes for Coordination Compounds — Telangana Open School (TOSS) Class 12 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

45 questions30 flashcards5 concepts

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Key Topics to Revise

1

Werner's Coordination Theory

  • Metals exhibit two types of valency: primary (ionizable) and secondary (non-ionizable).
  • Primary valency corresponds to the oxidation state and is satisfied by anions.
  • Secondary valency is the coordination number and is satisfied by ligands (neutral or charged).
2

Important Terms in Coordination Chemistry

  • Ligand: molecule or ion bonded to the central metal via lone pair donation.
  • Monodentate ligands donate one electron pair (e.g., H₂O, NH₃).
  • Bidentate ligands donate two electron pairs (e.g., ethylenediamine 'en').
3

Nomenclature of Coordination Compounds

  • Cation named before anion.
  • Ligands named first in alphabetical order (ignoring prefixes), then metal.
  • Anionic ligands end in '-o' (e.g., Cl⁻ → chloro), neutral ligands use common name (e.g., NH₃ → ammine).
4

Valence Bond Theory (VBT)

  • VBT explains geometry and magnetic behavior via hybridization.
  • Inner orbital complexes use (n-1)d orbitals — low spin, diamagnetic or less paramagnetic.
  • Outer orbital complexes use nd orbitals — high spin, more paramagnetic.

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Full Notes

Key Concepts

Werner proposed that metals exhibit twoLigands are molecules or ionsCoordination compounds are named by firstVBT explains bonding through hybridizationCFT treats ligands as point charges

Frequently Asked Questions

What are the important topics in Coordination Compounds for Telangana Open School (TOSS) Class 12 Chemistry?
Coordination Compounds covers several key topics that are frequently asked in Telangana Open School (TOSS) 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 — Telangana Open School (TOSS) Class 12 Chemistry?
Understand the core concepts first, then work through the 45 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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