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The crystal field stabilization energy (CFSE) of [Fe(H2O)6]Cl2 and K2[NiCl4] respectively, are : (1) -0.4Δo and -0.8Δt (2) -0.6Δo and -0.8Δt (3) -2.4Δo and -1.2Δt (4) -0.4Δo and -1.2Δt

1. -0.4Δo and -0.8Δt
2. -0.6Δo and -0.8Δt
3. -2.4Δo and -1.2Δt
4. -0.4Δo and -1.2Δt

Correct answer: -0.4Δo and -0.8Δt

Solution

The correct option reflects the appropriate crystal field stabilization energies for the given complexes, where [Fe(H2O)6] has a CFSE of -0.4Δo due to its octahedral field and low-spin configuration, while K2[NiCl4] has a CFSE of -0.8Δt, consistent with its tetrahedral geometry and the presence of weaker field ligands.

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