Preparation, Characterization, and Electrochemical Activation of a Model [Cp*Rh] Hydride
By Boyd, Emily A.; Lionetti, Davide; Henke, Wade C.; Day, Victor W.; Blakemore, James D.
Published in Inorganic Chemistry
Abstract
Monomeric half-sandwich rhodium hydride complexes are often proposed as intermediates in catalytic cycles, but relatively few such compounds have been isolated and studied, limiting understanding of their properties. Here, we report preparation and isolation of a monomeric rhodium(III) hydride complex bearing the pentamethylcyclopentadienyl (Cp*) and bis(diphenylphosphino)benzene (dppb) ligands. The hydride complex is formed rapidly upon addition of weak acid to a reduced precursor complex, Cp*Rh(dppb). Single-crystal X-ray diffraction data for the [Cp*Rh] hydride, which were previously unavailable for this class of compounds, provide evidence of the direct Rh