(b) The UV-Vis spectrum of the d4 octahedral complex ion [Cr"(H20)6]2+ shows one main absorption at 710 nm. 3A2g '428 80

[answerhappygod]

B The Uv Vis Spectrum Of The D4 Octahedral Complex Ion Cr H20 6 2 Shows One Main Absorption At 710 Nm 3a2g 428 80 1 (144.45 KiB) Viewed 35 times

(ii) With the aid of the Tanabe-Sugano diagram above reported,
calculate the Racah parameter B, the crystal-field splitting energy
O (in cm–1) and the Crystal-Field Stabilization Energy (CFSE) for
the ground state configuration of the complex. [20 marks]
(b) The UV-Vis spectrum of the d4 octahedral complex ion [Cr"(H20)6]2+ shows one main absorption at 710 nm. 3A2g '428 80 Tag 70 1T 1% 60 3P 1A28 3A28 3 Ang 50 1F 3T 28 E/B BES 40 3D, 'I 30 1A1g 37,36 3H 20 Eg Eg 1T 28 10 3T 5D Eg 3T 18 0 10 40 50 20 30 A/B (i) Given that for [Cr"(H20)6]2+ A0/B = 17, with reference to the Tanabe-Sugano diagram for d 4 octahedral complexes above reported, state whether the complex is expected to be high- or low-spin, identify the ground state and assign the absorption band to the corresponding electronic transition (hint: consider spin-allowed transitions only). [20 marks]