Question

The CFSE for a high-spin d⁴ octahedral complex is

• A. –0.6Δ_oct
• B. –1.8Δ_oct
• C. –1.6Δ_oct
• D. –1.2Δ_oct

Answer 1

The correct option is A –0.6Δ_oct

As we know high spin is due to a weak ligand , hence pairing up of electrons does not take place.

The following figure shows the filling of electrons in the subshells.

${△}_{oct}=1\times \left(3/5\right)-[3\times (2/5\left)\right]$
${△}_{oct}=-0.6{△}_{oct}$