Coordination Compounds
CBSE · Class 12 · Chemistry
Summary of Coordination Compounds for CBSE Class 12 Chemistry. Key concepts, important points, and chapter overview.
Overview
Coordination compounds represent one of the most fascinating areas of inorganic chemistry, forming the backbone of modern industrial processes and biological systems. These compounds, where central metal atoms are surrounded by ligands in specific geometric arrangements, are essential components in
Key Concepts
Alfred Werner proposed that metals exhibit
Alfred Werner proposed that metals exhibit two types of valences: Primary valence (ionizable, satisfied by negative ions) and Secondary valence (non-i
Coordination Entity
Coordination Entity: Central metal atom/ion bonded to fixed number of ligands (e.g., [Co(NH₃)₆]³⁺). Central atom/ion: The metal atom receiving electro
Formula writing
Formula writing: Central atom first, ligands alphabetically, entire coordination entity in square brackets. Naming: Ligands named alphabetically befor
Two main types
Two main types: Stereoisomerism (same bonds, different spatial arrangements) includes geometric (cis-trans in square planar/octahedral) and optical is
Metal uses hybrid orbitals (sp³
Metal uses hybrid orbitals (sp³, dsp², d²sp³, sp³d²) to bond with ligands. Inner orbital complexes (d²sp³) use inner d orbitals, often low spin. Outer
Learning Objectives
- Understand Werner's theory and its postulates regarding primary and secondary valences
- Master the terminology: coordination entity, central atom/ion, ligand, coordination number, coordination sphere
- Learn IUPAC nomenclature rules for coordination compounds
- Identify and classify different types of isomerism in coordination compounds
- Apply Valence Bond Theory to explain bonding, geometry, and magnetic properties
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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