Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II) is a coordination compound featuring a cyclopentadienyl ligand, two triphenylphosphine ligands, a chloride ligand, and a ruthenium center. It is widely utilized as a catalyst in various organic transformations, including olefin metathesis, hydrogenation, and C-H activation reactions. Additionally, it serves as a precursor for the synthesis of other ruthenium complexes with diverse applications in catalysis, material science, and medicinal chemistry.