Ti(H2O)6]3+ is coloured while [Sc(H2O)6]3+ is colourless. Why ?

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Md samim · Answer 1 · 2017-12-28T21:49:04+0000

[Ti(H₂O)₆]³⁺ : In this core Ti⁺³ has one unpaired e- while Sc+3 does not has any
unpaired electron.

mukul singh12 · Answer 2 · 2020-03-20T03:56:53+0000

Ti(H₂O)6 has unpaired electron for d-d transition so it is coloured .
While Sc(H₂O)₆ can not undergo d-d Transition so it is colourles is colorless due to the absence of unpaired electrons.