Intervalence of two planar chiral 2-methylferrocenyl groups over a diaurum bridge.

The electronic structure of recently reported diaurum (AuIAuI and XAuII-AuIIX) complexes, containing two methylferrocenyloxazoline ligands are described. Oxidations occurred at the methylferrocenyl and the monocation complex containing AuIAuI bridge was valence localized while the AuII-AuII complex was valence delocalized, i.e., Fe2.5+/Fe2.5+. These findings were supported by electrochemical, and spectroscopic measurements and further supported by computational analysis (DFT).