Crystal field theory explains successfully the structures of complexes, magnetic properties, colour and electronic spectra, thermodynamic and kinetic aspects of the complexes. However, the crystal field theory has some serious limitations.
The limitations of the crystal field theory are as follows
Why is [Ti(H2O)6)] 3+ violet in colour. The violet/purple colour of [Ti(H2O)6)] 3+ ion is due to absorption of blue-green light and transition of electron of the t2g orbitals to one of the degenerate eg ortibals. The absorption spectrum of [Ti(H2O)6)] 3+ reveals that the d-d transition occurs with a single broad peak.
What is the reason for the colour of potassium dichromate. Colour of dichromate ion. Why is chromate yellow in colour. Charge transfer transition. LMCT transition.