Rapid oxidative hydrogen evolution from a family of square-planar nickel hydride complexes.

ABSTRACT: A series of square-planar nickel hydride complexes supported by bis(phosphinite) pincer ligands with varying substituents (-OMe, -Me, and -Bu ^t ) on the pincer backbone have been synthesized and completely characterized by NMR spectroscopy, IR spectroscopy, elemental analysis, and X-ray crystallography. Their cyclic voltammograms show irreversible oxidation peaks (peak potentials from 101 to 316 mV vs. Fc⁺/Fc) with peak currents consistent with overall one-electron oxidations. Chemical oxidation by the one-electron oxidant Ce(NBu₄)₂(NO₃)₆ was studied by NMR spectroscopy, which provided quantitative evidence for post-oxidative H₂ evolution leading to a solvent-coordinated nickel(ii) species with the p

SUBMITTER: Ramakrishnan S 

PROVIDER: S-EPMC5950828 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature