Coordination Compounds – Interactive Quiz & Cheatsheet

Explore the bonding, nomenclature, and properties of coordination compounds interactively

Updated: 3 minutes ago

Categories: Mini Game, Chemistry, Class 11, Inorganic Chemistry
Tags: Mini Game, Chemistry, Class 11, Coordination Compounds, Ligands, Complexes, Werner Theory
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Coordination Compounds Cheatsheet & Quiz

Coordination Compounds Cheatsheet

Cheat Codes & Shortcuts

  • Definition: Coordination compounds consist of a central metal atom/ion bonded to surrounding molecules or ions called ligands.
  • Coordination Number: Number of ligand donor atoms bonded to the metal center.
  • Ligands: Classified as monodentate, bidentate, polydentate (chelating agents).
  • Complex Ion: Charged species formed by central metal and ligands.
  • Oxidation State: Charge assigned to the central metal after ligands are assigned.
  • Geometry: Common structures include octahedral, tetrahedral, square planar.
  • Isomerism: Coordination compounds show structural and stereoisomerism (cis-trans, optical).
  • Naming: Ligands named first (alphabetical order), metal named last with oxidation state in Roman numerals.
  • Chelate Effect: Stability increases with polydentate ligands due to ring formation.
  • CBC Theory: Describes bonding with sigma donation and pi back bonding.

Quick Reference Table

Concept Example / Form Description
Monodentate Ligand \( \text{NH}_3 \) Donates one lone pair to the metal.
Bidentate Ligand Ethylene diamine (\( \text{en} \)) Donates two lone pairs, chelates metal.
Coordination Number 6 (in \( \text{[Co(NH}_3)_6]^{3+} \)) Six ligands coordinate to central metal.
Geometry Octahedral Coordination number 6, common geometry.
Isomerism Cis-trans in \( \text{[Pt(NH}_3)_2Cl_2] \) Different spatial arrangements of ligands.
Oxidation State \( \text{Fe}^{3+} \) in \( \text{[Fe(CN)}_6]^{3-} \) Metal charge after assigning ligands.

Advice

Identify Ligands: Determine types and denticity first.

Determine Coordination Number: Count donor atoms around metal.

Check Geometry & Isomerism: Predict shape and possible isomers.

Practice Nomenclature: Correct order and oxidation states are vital.

Understand Stability: Chelate effect and ligand field impact complex stability.

Coordination Compounds Quick Tips

  • Central Metal: Usually a transition metal with variable oxidation states.
  • Ligands: Can be neutral or charged; monodentate or polydentate.
  • Coordination Number: Often 4 or 6, determines geometry.
  • Isomerism: Different types like geometric and optical isomers exist.
  • Stability: Chelate complexes are more stable due to entropy effects.

Coordination Compounds Speed Quiz

Test your knowledge with 5 coordination compounds questions! You have 30 seconds per question.