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. Author manuscript; available in PMC: 2015 Apr 9.
Published in final edited form as: Chem Rev. 2014 Mar 3;114(7):3659–3853. doi: 10.1021/cr400327t

Figure 24.

Figure 24

Delocalization in mixed-valent systems is due to the electronic coupling matrix element HAB associated with the direct bonding interaction between two metal ions and their superexchange interaction through bridging ligand orbitals.