Here’s a explanation:
High-spin complex:
- Forms with weak ligands like Cl⁻ or F⁻.
- Electrons stay unpaired as much as possible.
- Has more unpaired electrons → more magnetic.
Low-spin complex:
- Forms with strong ligands like CN⁻ or CO.
- Electrons pair up in lower-energy orbitals first.
- Has fewer unpaired electrons → less magnetic.
In short:
- High-spin = more unpaired electrons
- Low-spin = fewer unpaired electrons