High-Spin Complex
| Formula / Notation | High-spin: weak field ligand, max unpaired e⁻; Δ_oct < pairing energy |
|---|---|
| Also Known As | High-spin configuration, weak field complex, outer orbital complex (older term) |
What is High-Spin Complex?
A coordination complex in which the crystal field splitting energy is smaller than the pairing energy, causing electrons to occupy all d-orbitals singly before pairing occurs. High-spin complexes have the maximum number of unpaired electrons and are typically formed with weak-field ligands.
Formula & Notation
Other Names / Synonyms: High-spin configuration, weak field complex, outer orbital complex (older term)
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
A coordination complex in which the crystal field splitting energy is smaller than the pairing energy, causing electrons to occupy all d-orbitals singly before pairing occurs. High-spin complexes have the maximum number of unpaired electrons and are typically formed with weak-field ligands.
High-spin vs. low-spin determination is important in: explaining magnetic properties of coordination compounds (high-spin Fe³⁺ has 5 unpaired electrons, is paramagnetic), understanding enzyme active sites (high-spin Fe²⁺ in deoxy-haemoglobin becomes low-spin on O₂ binding, causing the structural cha…
High-spin metal complexes with paramagnetic centres may interfere with MRI contrast agent applications (competing signals). Safety considerations are those of the specific metal ion and ligands involved in the complex.
The formula or notation for High-Spin Complex is: High-spin: weak field ligand, max unpaired e⁻; Δ_oct < pairing energy