Controlled Interconversion of a Dinuclear Au Species Supported by a Redox-Active Bridging PNP Ligand Facilitates Ligand-to-Gold Electron Transfer.

ABSTRACT: Redox non-innocent ligands have recently emerged as interesting tools to obtain new reactivity with a wide variety of metals. However, gold has almost been neglected in this respect. Here, we report mechanistic investigations related to a rare example of ligand-based redox chemistry in the coordination sphere of gold. The dinuclear metal-centered mixed-valent Au^I -Au^III complex 1, supported by monoanionic diarylamido-diphosphine ligand PNP^Pr and with three chlorido ligands overall, undergoes a complex series of reactions upon halide abstraction by silver salt or Lewis acids such as gallium trichloride. Formation of the ultimate Au^I -Au^I complex 2 requires the intermediacy of Au^I -Au^I dimers 5 and 7 as well as the

SUBMITTER: Vreeken V 

PROVIDER: S-EPMC5413818 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature