The electronic spectrum of [CrF₆]³⁻ shows three bands at 14,900 cm⁻¹, 22400 cm⁻¹ and 34,800 cm⁻¹. The value of Δo in this case is:

(b) 14,900 cm⁻¹. Explanation: For d³ the lowest band equals Δo: 14,900 cm⁻¹ (b).

Q44 · CSIR-NET Chemistry, December 2011

Paper: CSIR-NET December 2011 · Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Electron Transfer Redox · Marks: 2 · Difficulty: Medium

The electronic spectrum of $\left[\mathrm{CrF}_{6}\right]^{3-}$ shows three bands at $14,900 \mathrm{cm}^{-1}, 22400 \mathrm{cm}^{-1}$ and $34,800 \mathrm{cm}^{-1}$. The value of $\Delta_{\mathrm{o}}$ in this case is:

(a)$5,500 \mathrm{cm}^{-1}$

(b)$14,900 \mathrm{cm}^{-1}$

(c)$22,400 \mathrm{cm}^{-1}$

(d)$34,800 \mathrm{cm}^{-1}$

Answer

Answer: B ✓ checked by 4AB · confidence high

Explanation

For d³ the lowest band equals Δo: 14,900 cm⁻¹ (b).

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