what are the assumptions of valence bond theory?
The VB theory, to a number of assumptions.
(i) It does not give quantitative interpretation of magnetic data.
(ii) It does not explain the colour exhibited by coordination compounds.
(iii) It does not give a quantitative interpretation of the thermodynamic or kinetic stabilities of coordination compounds.
(iv) It does not make exact predictions regarding the tetrahedral and square planar structures of 4-coordinate complexes.
(v) It does not distinguish between weak and strong ligands.