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Scientists are constantly discovering new compounds, orderly arranging the facts about them, trying to explain with the existing k...

CHEMICAL BONDING AND MOLECULAR STRUCTURE




Scientists are constantly discovering new compounds, orderly arranging the facts about them, trying to explain with the existing knowledge, organising to modify the earlier views or evolve theories for explaining the newly observed facts.

4.1 KÖSSEL-LEWIS APPROACH TO CHEMICAL BONDING
4.1.1 Octet Rule
4.1.2 Covalent Bond
4.1.3 Lewis Representation of Simple Molecules (the Lewis Structures)
4.1.4 Formal Charge
4.1.5 Limitations of the Octet Rule

4.2 IONIC OR ELECTROVALENT BOND4.2.1 Lattice Enthalpy


4.3 BOND PARAMETERS
4.3.1 Bond Length
4.3.2 Bond Angle
4.3.3 Bond Enthalpy
4.3.4 Bond Order
4.3.5 Resonance Structures
4.3.6 Polarity of Bonds


4.4 THE VALENCE SHELL ELECTRON PAIR REPULSION (VSEPR) THEORY

4.5 VALENCE BOND THEORY
4.5.1 Orbital Overlap Concept
4.5.2 Directional Properties of Bonds
4.5.3 Overlapping of Atomic Orbitals
4.5.4 Types of Overlapping and Nature of Covalent Bonds
4.5.5 Strength of Sigma and pi Bonds


4.6 HYBRIDISATION
4.6.1 Types of Hybridisation
(I) sp hybridisation:
(II) sp2 hybridisation:
(III) sp3 hybridisation:
4.6.2 Other Examples of sp3, sp2 and sp Hybridisation


4.7 MOLECULAR ORBITAL THEORY
4.7.1 Formation of Molecular Orbitals Linear Combination of Atomic Orbitals (LCAO)
4.7.2 Conditions for the Combination of Atomic Orbitals
4.7.3 Types of Molecular Orbitals
4.7.4 Energy Level Diagram for Molecular Orbitals
4.7.5 Electronic Configuration and Molecular Behaviour



4.8 BONDING IN SOME HOMONUCLEAR DIATOMIC MOLECULES

4.9 HYDROGEN BONDING
4.9.1 Cause of Formation of Hydrogen Bond
4.9.2 Types of H-Bonds


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