Question:
Mr Linus Pauling explain valance bond theory under quantum mechanical model write his four explanations with examples
Answer:
Valence bond theory-
1. The central metal atom or ion makes available a number of vacant orbitals equals to its coordination number.
2. These vacant orbitals form covalent bonds with ligands orbits.
3. A covalent bond is formed by overlap of a vacant metal orbital and filled ligand orbital.This completes overlap leads to formation of a metal ligand i.e. a sigma bond.
4 A strong covalent bond is formed only when the orbitals overlap to maximum extent.This maximum overlapping is possible only when the metal vacant orbitals undergo a process called hybridisation.
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