How do redox groups behave around a rigid molecular platform? Hexa(ferrocenylethynyl)benzenes and their "electrostatic" redox chemistry.
A new family of hexakis(ferrocenylethynyl)benzenes was synthesized by Negishi coupling from ethynylferrocenes and C(6)Br(6) and can be reversibly oxidized to stable hexaferrocenium salts (see picture, Ar(F)=[3,5-C(6)H(3)(CF(3))(2)]). Their cyclic voltammograms show a single six-electron wave, three distinct two-electron waves, or a cascade of six single-electron waves, depending on the electrolyte counterion and number of methyl substituents on the ferrocenyl groups.
Diallo
Abdou K
AK
Institut des Sciences Moléculaires, UMR CNRS No.5255, Université Bordeaux 1, 33405 Talence, France.
Daran
Jean-Claude
JC
Varret
François
F
Ruiz
Jaime
J
Astruc
Didier
D