We shall focus our attention on elementary
treatment of the application of VBT and CFT to coordination compounds According to this theory, the metal atom or ion under the influence of
ligands can use its (n-1)d, ns, np or ns, np, nd orbitals for hybridisation
to yield a set of equivalent orbitals of definite geometry such as octahedral,
tetrahedral, square planar and so on (Table 5 2) These hybridised orbitals
are allowed to overlap with ligand orbitals that can donate electron pairs
for bonding