twelve aryl(phenyl)iodonium salts in a systematic chemoselectivitystudy. A new “anti‐ortho effect” has been identified in the arylation of malonates. Several “dummy groups” have been found that give complete chemoselectivity in the transfer of the phenyl moiety, irrespective of the nucleophile. An aryl exchange in the diaryliodoniumsalts has been observed under certain arylation conditions. DFT calculations