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Crystal field stabilization energy for high spin d⁴ octahedral complex is:

1. -1.8 Δ₀
2. -1.6 Δ₀ + P
3. -1.2 Δ₀
4. -0.6 Δ₀

Correct answer: -1.6 Δ₀ + P

Solution

In a high-spin d⁴ octahedral complex, three electrons occupy t₂g orbitals and one electron occupies an eg orbital. The crystal field stabilization energy (CFSE) is calculated as (-0.4 × 3) + (+0.6 × 1) = -1.2 Δ₀ + pairing energy (P), which matches option B.

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