This course covers the theories related to the Wave Mechanical Concept of the covalent bond beyond Lewis theory.
The following are the highlights of the course –
•A brief idea about wavefunction.
•Valence Bond Theory – Its postulates and limitations.
•Molecular Orbital Theory –
What is M. O. Theory?
Conditions for the combination of Atomic Orbitals – The LCAO concept.
Effective overlap of Atomic Orbitals – The symmetry conditions.
Types of Molecular Orbitals and how we obtain them? (sigma and pi M. O.)
Distribution of Molecular Orbitals and its discrepancy – Orbital mixing.
The concept of s-p Mixing.
Bonding and Antibonding M. O.s – What do they mean?
•Construction of Molecular Orbital Diagrams – How to draw M. O. diagrams?
Homonuclear molecules – H, He, Li, Be, B, C, N, O, F and Ne molecules;
Various types of Oxygen ions.
Heteronuclear molecules – The concept behind heteronuclear M. O. diagram construction.
CO, NO and HF.
•Calculation of Bond Order.
•Comparative analysis of Valence Bond and Molecular Orbital Theories.
•The VSEPR concept – Salient Features
Relation with Hybridization, Bond angle, and Electron Pairs.
Applying VSEPR theory to –
Molecules with regular geometry –
BeF2, BCl3, CH4, PF5, SF6, IF7
Molecules with irregular geometry –
IF5, ClF3, SF4, XeF2, I3-, XeOF2
•Tips and tricks to flawlessly predict molecular geometries using VSEPR.
•Applying VSEPR concept – explained with few practice problems.