Question

The electronic spectrum of [Ti(H₂O)₆]³⁺ shows a single broad peak with a maximum at 20,300 cm⁻¹. The crystal field stabilisation energy (CFSE) of the complex ion, in kJ mol⁻¹, is ______. (1 kJ mol⁻¹ = 83.7 cm⁻¹)

विकल्प

• 242.5

• 145.5

• 83.7

• 97

Answer 1

The electronic spectrum of [Ti(H₂O)₆]³⁺ shows a single broad peak with a maximum at 20,300 cm⁻¹. The crystal field stabilisation energy (CFSE) of the complex ion, in kJ mol⁻¹, is 97.

Explanation:

The oxidation state of Ti in the given compound is +3. Ti³⁺ has an electronic configuration of 3d¹4s⁰, and orbitals will be occupied by H₂O ligands at t_2g^1,0,0 e_g^0,0. Hence,

CFSE = 0.4 Δ_o 

= `0.4 xx 20300/83.7`

= 97 kJ mol⁻¹