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Coordination Compounds — Revision Notes

Telangana Open School (TOSS) · Class 12 · Chemistry

Coordination Compounds revision notes for Telangana Open School (TOSS) Class 12 Chemistry: 4 topics in quick points.

45 questions30 flashcards2 formulas & key relations5 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?
Key topics in Coordination Compounds include Werner's Coordination Theory, Important Terms in Coordination Chemistry, Nomenclature of Coordination Compounds, Valence Bond Theory (VBT). Study these first, then practise questions on each for the Telangana Open School (TOSS) Class 12 board exam.
How should I revise Coordination Compounds for the Telangana Open School (TOSS) Class 12 board exam?
Learn the core ideas first, then work through the 45 practice questions on Coordination Compounds. Revise 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.

More resources for Coordination Compounds

All Telangana Open School (TOSS) Class 12 Chemistry Revision Notes

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