Question

write down the basic Merit and demerit of valence bond theory​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Valence bond theory can explain the nature of bonding as well as various properties of coordination compounds.

Merits of Valence bond theory:

1. Valence bond theory explains the geometrical shape and magnetic properties of complexes satisfactorily.
2. It explains the formation of inner complexes in the presence of strong ligands and outer complexes in the presence of weak ligands.
3. It explains the back donation of electrons from metal ions to ligands through dπ pπ overlapping. This explains why weak ligands like CO and H2O form strong bonds with metal ions.

Demerits of valence bond theory:

1. Valence bond theory does not give information regarding magnetic moment due to the orbital contribution of electrons.
2. It can not explain the spectral properties of complexes.
3. It does not explain the relative stability of complex compounds.

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