series of heteroleptic [Cu(phenantroline)(bisisonitrile)]+-complexes was synthesized, and their structural, spectroscopic, and electrochemical properties were investigated. The new copper(I) complexes were employed as photoredox-catalysts in the visible-light-mediated atom transfer radical addition (ATRA). Especially, [Cu(dpp)(binc)]BF4 (6a-BF4)(dpp = 2,9-diphenyl-1,10-phenanthroline; binc = bis(2-isocyanophenyl)
as a visible-light photoredox catalyst for the atom-transfer radicaladdition (ATRA) of benzyl halides to styrenes and silyl enol ethers. The resulting ATRA products can be readily converted into tetrahydroquinolines. Cu(dap)2Cl has been utilized as a visible-light photoredox catalyst for the atom-transfer radicaladdition (ATRA) of benzyl halides to styrenes and silyl enol ethers. The resulting ATRA