Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

e-g electrons

Electrons occupying the higher-energy eg orbitals.

t-2-g electrons

Electrons occupying the lower-energy t2g orbitals.

Compute the octahedral crystal field stabilization energy in units of the ligand field splitting Delta-o from the t2g and eg electron counts: CFSE = (-0.4*n(t2g) + 0.6*n(eg)) * Delta-o. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

CFSE (Δ₀)

Stabilization energy in multiples of Delta-o; negative values are net stabilization.

• Bond, orbital, and structure rules are simplified representations. Resonance, relativistic effects, electron correlation, molecular geometry, oxidation state, and the measurement or computational method affect tabulated and predicted values.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.

• Density From Unit Cell Calculator

  Calculate crystal density from formula-unit molar mass, formula units per cell, and unit-cell volume.

• Delta G From K

  Compute Gibbs free energy change in kJ per mole from the equilibrium constant as -R times T times ln(K).

• Octahedral Jahn-Teller Distortion Checker

  Check whether an octahedral complex has uneven e_g occupancy and therefore a strong Jahn-Teller distortion; t2g-only weak distortions are outside this check.