Low-Spin Complex
| Formula / Notation | Low-spin: strong field ligand, Δ_oct > pairing energy; paired electrons in t₂g |
|---|---|
| Also Known As | Low-spin configuration, strong field complex, inner orbital complex (older term) |
What is Low-Spin Complex?
A coordination complex in which the crystal field splitting energy is larger than the pairing energy, causing electrons to fill lower d-orbitals before occupying higher ones. Low-spin complexes have fewer unpaired electrons and are typically formed with strong-field ligands such as CN⁻.
Formula & Notation
Other Names / Synonyms: Low-spin configuration, strong field complex, inner 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 larger than the pairing energy, causing electrons to fill lower d-orbitals before occupying higher ones. Low-spin complexes have fewer unpaired electrons and are typically formed with strong-field ligands such as CN⁻.
Low-spin vs. high-spin distinction is critical in: understanding the magnetic properties of coordination compounds (low-spin Fe³⁺: 1 unpaired e⁻; high-spin: 5 unpaired), explaining the colour and UV-Vis spectra of complexes (low-spin have larger Δ → blue shift), and in the design of MRI contrast age…
No direct safety concern for the classification. Low-spin complexes may be more kinetically inert (higher CFSE, harder to substitute) — relevant for understanding why low-spin cobalt(III) and chromium(III) complexes are inert in biological and analytical contexts.
The formula or notation for Low-Spin Complex is: Low-spin: strong field ligand, Δ_oct > pairing energy; paired electrons in t₂g