Possibility of Nickel(I) complex in Suzuki-Miyaura coupling using pincer-type 1,2,3-triazolylidene Nickel(II) complex

Abstract

Abstract The catalytic behavior of Ni(II) complexes bearing a tridentate 1,2,3-triazolylidene ligand in the Suzuki-Miyaura coupling of bromoarenes was studied experimentally and theoretically. The reaction of Ni(II) complex with K3PO4 produced a paramagnetic Ni(I) species rather than a 2e-reduced Ni(0) species. A Ni(II)–phenyl complex was obtained via transmetalation; however, it was inactive during the catalytic process. A theoretical study also indicated the possibility of using Ni(I) species as intermediates in the catalytic process.