Metallacarboranes as Photoredox Catalysts in Water

Metallacarboranes with the shape of the Greek letter θ, such as [Co(C 2 B 9 H 11 ) 2 ] − , were tested, for the first time, as efficient photoredox catalysts in the oxidation of aromatic and aliphatic alcohols in water. Their efficiency is linked to their high solubility in water, their high oxidizing power (Co 4+/3+ ), and their absence of fluorescence on excitation, among others. In most of the studied examples, using a catalyst load of 0.4...