Crystal field splitting in tetrahedral complexes
In tetrahedral complexes , four ligands may be imagined to occupy the alternate comers of the cube and the metal ion at the center of the cube .
Energy of t2g set of orbitals > Energy of eg set of orbitals .
In such complexes d – orbital splitting is inverted and is smaller as compared to the octahedral field splitting .
Orbital splitting energies are so low that pairing of electrons are not possible so these are high spin complexes .
Colour in Coordination Compounds
The crystal field theory attributes the colour of the coordination compounds to dod transition of the electron , i . e ., electron jump from t2g level to higher eg level .
In the absence of ligands , crystal field splitting does not occur and hence the substance is colourless .