Molecular Orbital Theory in One shot | MOT, Bond Order, Magnetism & Configuration Class 11

This video provides a comprehensive overview of Molecular Orbital Theory (MOT), explaining how atomic orbitals combine to form molecular orbitals. It is designed for chemistry students (Class 11/12 and entry test preparation) to understand molecular stability, bond order, and magnetic properties. Key Concepts Covered: Introduction to MOT: Proposed by Hund and Mulliken in 1932, this theory addresses limitations in the Valence Bond Theory regarding molecule stability and magnetic behavior (0:29) Main Postulates: Atomic orbitals combine to form new molecular orbitals (2:45). Atomic orbitals lose their individual identity upon bonding (3:05). The number of molecular orbitals formed equals the number of atomic orbitals combined (3:32). Formation of Bonding Molecular Orbitals (BMO) (low energy, stable) and Antibonding Molecular Orbitals (ABMO) (high energy, unstable) (4:45) Filling Rules: Electron filling follows the Aufbau principle, Pauli exclusion principle, and Hund’s rule (6:47) Bonding Types: Explains head-to-head overlap (sigma bonds) and side-to-side overlap (pi bonds) (7:47) Applications: Magnetic Behavior: Determined by the presence of unpaired electrons; molecules with unpaired electrons are paramagnetic, while those with all paired electrons are diamagnetic (10:38 ) Bond Order Calculation: A formula is provided: (Number of electrons in BMO - Number of electrons in ABMO) / 2 (11:30 ) Stability: If the bond order is 0, the molecule is considered unstable and does not exist (12:43 ) Electronic Configuration: The video details specific energy-level configurations for diatomic molecules, noting a key difference for molecules like $O2$ and $F2$ versus smaller ones like $N2$ and $C2$ (13:52 ) 📢 Watch till the end for quick tricks and exam tips! @chemistry by Ali CBA_Notebook 👍 Like | Share | Subscribe for more Chemistry lectures 🔔 Turn on notifications so you don’t miss upcoming videos #MolecularOrbitalTheory #MOT #ChemistryLecture #Class11Chemistry #Class12Chemistry #BondOrder #Paramagnetism #ChemicalBonding #ChemistryByAli #FSCchemistry #MDCATPrep #ECAT