high-spin complex

These two cytochromes are considered high-spin complexes, what is directly related to the electrons' spin.

It is configurationationally labile, high-spin complex with five unpaired electrons.

The spin-only formula is a good first approximation for high-spin complexes of first-row transition metals.

Ferric acetylacetonate, Fe(acac), is a red high-spin complex that is highly soluble in organic solvents.

It is now known that the iron(II) in hemoglobin is a low-spin complex, whereas in oxyhemoglobin it is a high-spin complex.

An example occurs in octahedral, high-spin complexes of manganese(II), which has a d configuration in which all five electron has parallel spins; the colour of such complexes is much weaker than in complexes with spin-allowed transitions.