Tetrahedral complexes are high spin because
(i) Δt = 4/9 Δo, i.e., tetrahedral crystal field splitting is half the crystal field splitting in octahedral complexes.
(ii) Δt is always less than the pairing energy.
Due to these two reasons, no pairing of electrons occurs in d3, d4, d5, d6 and d7 tetrahedral complexes. Therefore, the tetrahedral complexes of these configurations are always high spin whether the ligands are strong or weak.
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.
What is the difference between d-d transition and charge transfer transition. How do we distinguish between d-d and MLCT transistions.