Additive tuning of redox potential in metallacarboranes by sequential halogen substitution.
The first artificially made set of electron acceptors is presented that are derived from a unique platform Cs[3,3'-Co(C(2)B(9)H(11))(2)], for which the redox potential of each differs from its predecessor by a fixed amount. The sequence of electron acceptors is made by substituting one, two, or more hydrogen atoms by chlorine atoms, yielding Cs[3,3'-Co(C(2)B(9)H(11-y)Cl(y))(C(2)B(9)H(11-z)Cl(z))]. The higher the number of chlorine substituents, the more prone the platform is to be reduced. The effect is completely additive, so if a single substitution implies a reduction of 0.1 V of the redox potential of the parent complex, then ten substitutions imply a reduction of 1 V.
González-Cardoso
Patricia
P
Institut de Ciència de Materials de Barcelona (CSIC), Campus de la U.A.B., 08193 Bellaterra, Spain.
Stoica
Anca-Iulia
AI
Farràs
Pau
P
Pepiol
Ariadna
A
Viñas
Clara
C
Teixidor
Francesc
F
D001880:Boranes / Q000737:chemistry*; D002586:Cesium / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D004579:Electron Transport; D054879:Halogenation; D006219:Halogens / Q000737:chemistry*; D007700:Kinetics; D008670:Metals / Q000737:chemistry*; D015394:Molecular Structure; D010084:Oxidation-Reduction; D013237:Stereoisomerism; D013329:Structure-Activity Relationship
D001880:Boranes; D006219:Halogens; D008670:Metals; D002586:Cesium; D003035:Cobalt