Molecular Orbital Theory
Chapter Name : Chemical Bonding And Molecular Structure |
Sub Topic Code : 102_11_04_08_04 |
Topic Name : Molecular Orbital Theory |
|
Sub Topic Name : Types Of Molecular Orbitals |
|
Introduction
• Molecular orbitals of diatomic molecules are of 3 types: 1. Sigma, 2. Pi and 3. Delta Sigma bonding and antibonding molecular orbitals are symmetric along the bonding molecular plane while pi molecular orbitals are not.
Pre-Requisites:
Covalent bond, polyatomic molecule , atomic and molecular orbital
Activity:
Many things in nature are symmetrical e.g. insects, leaves.
Real Life Question:
Why are things having symmetry?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Molecular orbital | Orbitals formed when atomic orbitals combine by hybridisation. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Square piece of paper, circular piece of paper, | Fold the papers and see whether they are symmetrical or not. |
Real life uses :
Symmetry helps to group things.
Places to visit :
Zoo, garden.
Practical examples around us
| Examples | Explainations |
|---|---|
| Leaves, insects | Notice the symmetry in the structure of things for ex: leaves and insects about a single plain or more than one plain. |
What you learn in Theory:
Molecular orbitals are of three types: sigma, pi and delta.
What you learn in Practice:
Similar energies are important for atomic orbitals to combine.