Pairing Energy
| Also Known As | Electron pairing energy, spin pairing energy, P (pairing energy) |
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What is Pairing Energy?
The energy cost of placing two electrons in the same orbital, where they experience electron-electron repulsion. In transition metal complexes, pairing energy competes with crystal field splitting energy to determine whether a high-spin or low-spin complex forms.
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The energy cost of placing two electrons in the same orbital, where they experience electron-electron repulsion. In transition metal complexes, pairing energy competes with crystal field splitting energy to determine whether a high-spin or low-spin complex forms.
Pairing energy is used in: predicting whether a complex is high-spin or low-spin (comparing Δ_oct with P), calculating CFSE for high-spin vs. low-spin configurations, understanding magnetic properties (high-spin = more unpaired electrons = stronger paramagnetism), and in rationalising stability diff…
No direct safety concern. Pairing energy affects the electronic and magnetic structure of transition metal complexes — relevant to understanding the reactivity of metal centres in catalysis and the biological function of metalloproteins.