Thus, the degeneracy of the d orbitals
has been removed due to ligand electron-metal electron repulsions
in the octahedral complex to yield three orbitals of lower energy, t2g
set and two orbitals of higher energy, eg set This splitting of the
Rationalised 2023-24
132
Chemistry
degenerate levels due to the
presence of ligands in a
definite geometry is termed as
crystal field splitting and
the energy separation is
denoted by Do (the subscript
o is for octahedral) (Fig 5 8)