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Wednesday, August 28, 2019

Why violet colour of [Ti(H2O)6]Cl3 disapear (colourless) on heating heating ?

[Ti(H2O)6]Cl3 is an octahedral violet colour complex; the violet colour of this complex is due to d-d transition of a single (d1) electron from t2g lower level to eg higher level by absorbing corresponding energy of yellow green region of light and emitted energy corresponding to violet region and hence appears violet in colour. But on heating it is dehydrated and water molecules (ligand) removed so in absence of ligand splitting of D orbitals does not occur hence it becomes colourless.

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