Abstract:
The proton-dependent redox chemistry of dyads comprised of a ferrocenyl electron donor directly
linked to a hydroquinonyl electron donor or to a quinone electron acceptor by a single covalent bond has
been characterized. Ferrocenyl-1,4-hydroquinone (2), ferrocenyl-1,4-benzoquinone (3), 3-ferrocenyl-1,2-
catechol (5), and the precursors ferrocenyl-1,4-dimethoxybenzene (1) and 3-ferrocenyl-1,2-dimethoxybenzene
(4) were studied; also the unstable compound 3-ferrocenyl-1,2-benzoquinone (6) was observed
in the spectroelectrochemistry of 5. Detailed cyclic voltammetry, coulommetry, and UV-vis-NIR
spectroelectrochemistry experiments allied with EPR, NMR, and Mo¨ssbauer spectroscopy were used to
probe the pH-dependent redox chemistry and electron distribution within the compounds.
