Bis(triphenylphosphine)rhodium carbonyl chloride is the organorhodium complex with the formula [RhCl(CO)(PPh<sub>3</sub>)<sub>2</sub>]. This complex of rhodium(I) is a bright yellow, air-stable solid. It is the Rh analogue of Vaska's complex, the corresponding iridium complex. With regards to its structure, the complex is square planar with mutually trans triphenylphosphine (PPh<sub>3</sub>) ligands. The complex is a versatile homogeneous catalyst.
Bis(triphenylphosphine)rhodium carbonyl chloride was originally prepared by treating Rh<sub>2</sub>Cl<sub>2</sub>(CO)<sub>4</sub> with triphenylphosphine. However, it is typically produced by the carbonylation of Wilkinson's catalyst:
In homogeneous catalysis, this conversion is typically an undesirable side-reaction since [RhCl(CO)(PPh<sub>3</sub>)<sub>2</sub>] is a poor hydrogenation catalyst.
Bis(triphenylphosphine)rhodium carbonyl chloride is the precursor to tris(triphenylphosphine)rhodium carbonyl hydride, an important catalyst for hydroformylation.