Question

What are the limitations of VBT (Valence bond theory)?

Answer 1

The overlapping of two half filled valence orbitals of two different atoms result in the formation of the covalent bond. Due to overlapping, the electron density between two bonded atoms increases and this gives stability to the molecule.

Answer 2

Limitations of the valence bond hypothesis are:

• Failure to clarify the tetra valency displayed via carbon

• No knowledge offered on the energies of the electrons.

• The hypothesis accepts that electrons are restricted in some areas.

• It doesn't give quantitative information on the thermodynamic or active dependable qualities of coordination mixes.

• No qualification among powerless and solid ligands.

• No clarification for the colour displayed by compounds and elements.

• The valence bond hypothesis was advanced by the German physicists Walter Heinrich Heitler and Fritz Wolfgang London as the Lewis method to deal with elements holding neglected how the development of compound bonds works.

• Additionally, valence shell electron pair aversion hypothesis (or VSEPR hypothesis) had restricted applications.

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