what is valence bond theory? drawbacks
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Valence bond theory explains the geometry of the complex compound using the concept of hybridization. This theory is a chemical bonding theory that explains the bonding between two atoms is caused by the overlap of half-filled atomic orbitals. The two atoms share each other's unpaired electron to form a filled orbital to form a hybrid orbital and bond together. According to this theory, a covalent bond is formed between the two atoms by the overlap of half filled valence atomic orbitals of each atom containing one unpaired electron.
DRWABACKS....
●It fails to account for various magnetic, electronic and spectroscopic properties of complexes.
●It describes the bonding in coordination compound qualitatively.
●It does not offer any explanation for the optical absorption spectra of the complexes.
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According to this theory a covalent bond is formed between two atoms by the overlap of half filled valence atomic orbitals of each atom containing one unpaired electron.
Drawbacks
Failure to explain the tetravalency exhibited by carbon
No insight offered on the energies of the electrons.
The theory assumes that electrons are localized in specific areas
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