Ligand-Centered Triplet Diradical Supported by a Binuclear Palladium(II) Dipyrrindione.

ABSTRACT: Oligopyrroles form a versatile class of redox-active ligands and electron reservoirs. Although the stabilization of radicals within oligopyrrolic π systems is more common for macrocyclic ligands, bidentate dipyrrindiones are emerging as compact platforms for one-electron redox chemistry in transition-metal complexes. We report the synthesis of a bis(aqua) palladium(II) dipyrrindione complex and its deprotonation-driven dimerization to form a hydroxo-bridged binuclear complex in the presence of water or triethylamine. Electrochemical, spectroelectrochemical, and computational analyses of the binuclear complex indicate the accessibility of two quasi-reversible ligand-centered reduction processes. The product of a two-electron chemical reduction by cobaltocene was isolated and characterized.

SUBMITTER: Curtis CJ 

PROVIDER: S-EPMC8389801 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature