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Answer in brief. With the help of the crystal field, energy-level diagram explain why the complex [Cr(en)3]3⊕ is coloured? - Chemistry

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Short Note

Answer in brief.

With the help of the crystal field, energy-level diagram explain why the complex [Cr(en)3]3⊕ is coloured?

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Solution

i. The central metal ion titanium has electronic configuration 3d3 and the electrons occupy one of the t2g orbitals.

d - d transition in d' system

ii. The absorption of the wavelength of light promotes an electron from the t2g level to eg level. Therefore, in the complex [Cr(en)3]3+, d-d transitions are possible. Hence, the complex is coloured.

Concept: Theories of Bonding in Complexes
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Balbharati Chemistry 12th Standard HSC for Maharashtra State Board
Chapter 9 Coordination Compounds
Exercises | Q 3.1 | Page 208
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