What is the Valence Bond Theory and Molecular Orbital Theory (VBT and MOT)?
What are the Difference between them?
Answer: VBT and MOT, VBT and MOT, VBT and MOT
Valence Bond Theory and Molecular Orbital Theory (VBT and MOT)
Valence bond theory (VBT)
- After the bond formation, the combining atoms in a molecule retain their identity.
- Bonding is explained with the help of atomic orbitals.
- Only the half-filled atomic orbitals of the valence shell take part in bond formation.
- The concept of resonance is applicable only to valence bond theory.
- It cannot explain the paramagnetic character of the O2 molecule.
- This theory finds difficulty in explaining the stability of one and three-electron bonds having unpaired electrons.
- VBT cannot explain the formation of O2+ and O2- ions from O2 have a stable octet.
Molecular orbital theory (MOT)
- After the bond formation, the combining atoms in a molecule lose their identity.
- It explains bonding with the help of molecular orbitals.
- It considers all the electrons in the atoms for the prediction of several bonds per atom.
- Resonance has no role in the molecular orbital theory.
- It explains the paramagnetic character of the O2 molecule.
- MOT can easily explain the formation of one electron bond and three-electron bonds.
- MOT can explain the formation of O2+ and O2- ions from O2.
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