Hydridotetrakis(triphenylphosphine)rhodium(I) is the coordination complex with the formula HRh[P(C<sub>6</sub>H<sub>5</sub>)<sub>3</sub>]<sub>4</sub>. It consists of a Rh(I) center complexed to four triphenylphosphine (PPh<sub>3</sub>) ligands and one hydride. The molecule has idealized C<sub>3v</sub> symmetry. The compound is a homogeneous catalyst for hydrogenation and related reactions. It is a yellow solid that dissolves in aromatic solvents.
In the presence of base, H<sub>2</sub>, and additional triphenylphosphine, Wilkinson's catalyst (chloridotris(triphenylphosphane)rhodium(I)) converts to HRh(PPh<sub>3</sub>)<sub>4</sub>: