Configuration

Energy Levels

Select geometry above

Electron Configuration

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Crystal Field Theory

Octahedral: e_g raised +0.6Δ, t_2g lowered −0.4Δ. Net CFSE = electrons × energy offset.

High spin (weak Δ): Hund's rule rules. Low spin (strong Δ): pairing preferred.

Crossover at Δ = P.