Lcao ppt
- 1. PRESENTED BY- PRANAV.M XI A K. V. NO.2 KASARAGOD
- 2. Concept introduced in Molecular orbital theory. to overcome the problem of being unable to solve the Schrödinger equation for a system with more than one electron WHAT IS LCAO
- 3. According to LCAO atomic orbitals interfere constructively and destructively to form molecular orbitals. If an electron can be found in an atomic orbital belonging to atom A and also to atom B, then the overall wave function is a superposition of the two orbitals. FEATURES OF LCAO
- 4. BMO-bonding molecular orbitals are formed when wave functions of atomic orbitals are added- There occurs constructive interference of atomic orbitals- Atomic orbitals overlap each other in phase. BMO
- 5. Electron density is located between the nuclei- reduces repulsion between them- reduces the energy of the molecular orbital- stabilizes the system The energy of BMO is always less than the participating atomic orbitals PROPERTIES OF BMO
- 6. ABMO-antibonding molecular orbitals are formed when- Wave functions of atomic orbitals are subtracted- There occurs destructive interference of atomic orbitals- Atomic orbitals overlap without phase ABMO
- 7. Electron density is located far away from the two nuclei which creates a nodal plane between the nuclei- Increases repulsion between them- Increases the energy of the system- Destabilizes the molecule The energy of ABMO is higher than that of parent atomic orbitals. PROPERTIES OF ABMO
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- 11. THANK YOU!!!