what are the limitations of VBT (valence bond theory)?
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this theory does not discuss the electron engeries
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Valence bond theory introduced five new concepts in chemical bonding as follows:
(1) Delocalisation of electron over the two nuclei.
(2) Shielding effect of electrons
(3) Covalent character of bond
(4) Partial ionic character of a covalent bond
(5) The concept of resonance and corelation between resonance energy and molecular stability
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