Q35 · CSIR-NET Chemistry, June 2013

Paper: CSIR-NET June 2013 · Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Electron Transfer Redox · Marks: 2 · Difficulty: Easy

The electronic transition responsible for the colour of the transition metal ions is

(a)$\mathrm{d}_{\pi} \rightarrow \mathrm{d}_{\sigma}$

(b)$\mathrm{d}_{\pi} \rightarrow \mathrm{d}_{\sigma} *$

(c)$\mathrm{d}_{\pi} \rightarrow \mathrm{d}_{\pi}{ }^{*}$

(d)$\mathrm{d}_{\sigma} \rightarrow \mathrm{d}_{\pi}{ }^{*}$

Answer

Answer: B ✓ checked by 4AB · confidence high

Explanation

d–d colour comes from promoting an electron from t₂g (dπ) to e_g (dσ*) (b).

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