Question

why [Ni(en)3]+2 is violet colour

Answer 1

Answer:

Explanation:

en is a neutral polydentate ligan.d.

So,Ni has charge +2.

Electronic configuration of Ni2+:-[Ar]3d8

So,there are two unpaired electrons. So,due to d-d transition and charge transfer,the compound shows violet colouration.

Answer 2

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REASON :

★ The color arises from the change in energy between the t2g-eg orbitals. 'en' is a stronger field lîgānd, which pushes the orbitals further apart from one another as well as displaces the H2O lïgānds from the metal center.