Valence bond theory was introduced by:

Valence bond theory was proposed by Linus Pauling and later supported by slater. This theory explains the formation of a covalent bond between the atoms of molecules.

Postulates of valence bond theory

The important postulates of the valence bond theory are listed below.

  • A covalent bond is formed by overlapping of valance orbitals or salts containing unpaired electrons with antiparallel spin.
  • The strength of overlap determines the strength of bonding between the atoms in the molecule.
  • The overlapping of orbitals is always directional.
  • The overlapping depends upon the size and energy of the orbitals.
  • A sigma bond is formed by the axial overlap of orbitals.
  • A π bond is formed by the axial overlap of orbitals.
  • Greater is the overlapping of orbitals stronger is the bond and stable is the molecule.

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