Mixed-valence complex

Mixed valence complexes contain an element which is present in more than one oxidation state.

Many solids are mixed-valency including indium chalcogenides.

Mixed-valence compounds are subdivided into three groups, according to the Robin–Day classification:[3] The Creutz–Taube complex is a robust, readily analyzed, mixed-valence complex consisting of otherwise equivalent Ru(II) and Ru(III) centers bridged by the pyrazine.

This complex serves as a model for the bridged intermediate invoked in inner-sphere electron transfer.

[11] Mixed valency in fact seems to be required for organic compounds to exhibit electrical conductivity.

The biferrocenium cation is classified as type II mixed valence complex. [ 1 ]
The structure of the Creutz-Taube complex.
[Ru 2 (OAc) 4 Cl] n is a coordination polymer that is also mixed-valence (Ru(II)Ru(III)).
Edge-on view of the crystal structure of hexamethylene TTF /TCNQ charge transfer salt, which features mixed valency. [ 10 ]