The electronic spectrum of shows a single broad peak with a maximum at 20,300 cm⁻¹. The crystal field stabilization energy (CFSE) of the complex ion, in kJ mol⁻¹, is:
(1 kJ mol⁻¹ = 83.7 cm⁻¹)

Question

The electronic spectrum of  shows a single broad peak with a maximum at 20,300 cm⁻¹. The crystal field stabilization energy (CFSE) of the complex ion, in kJ mol⁻¹, is:
(1 kJ mol⁻¹ = 83.7 cm⁻¹)

Canvas Classes · Accepted Answer

Strategy:
 The absorption maximum directly equals the crystal field splitting energy (). We must calculate CFSE and convert units.

Step 1: Identify the complex state
 has , which is a  ion.
It occupies the lowest state: .
CFSE for a  ion is .

Step 2: Calculate CFSE
Given .
.
Magnitude is .

Step 3: Convert to kJ/mol
.
.
(Rounding off gives 97).

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