Elucidating electron-transfer events in polypyridine nickel complexes for reductive coupling reactions.

ABSTRACT: Polypyridine-ligated nickel complexes are widely used as privileged catalysts in a variety of cross-coupling reactions. The rapid adoption of these complexes is tentatively attributed to their ability to shuttle between different oxidation states and engage in electron-transfer reactions. However, these reactions are poorly understood in mechanistic terms. Here we investigate the reactivity of pseudohalide- and halide-ligated Ni(II) complexes, containing polypyridine ligands, in electron-transfer reactions. Specifically, Ni(II) halide complexes trigger comproportionation with Ni(0) with exceptional ease en route to Ni(I)L _n species, whereas the corresponding Ni(II) pseudohalide congeners are resistant to electron transfer, with Ni(I) pseudohalides being prone to dispropor

SUBMITTER: Day CS 

PROVIDER: S-EPMC11546168 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature