Sn(IV)-protoporphyrin IX; oxygen; benzoic acid anhydride; heptylviologen dichloride; Fe(III)tetra(pentafluoro-phenyl)porphyr in acetonitrile Ambient temperatureIrradiationAlcohol/ketone product ratio investigated. Other catalyst, other photosensitizer, other reductant, other reagent. Dark reaction investigated.; Product distribution;