[1,1'-Bis(di-phenyl-phosphan-yl)cobalto-cenium-κ(2) P,P'](η(5)-cyclo-penta-dien-yl){2-[4-(4-ethynylphen-yl)phen-yl]ethynyl-κC}ruthenium(II) hexa-fluorido-phosphate.

In the title compound, [CoRu(C5H5)(C16H9)(C17H14P)2]PF6, the Ru(II) atom is coordinated by a cyclo-penta-dienyl ring in an η(5)-mode, one C atom from a 4,4'-diethynyl-1,1'-biphenyl ligand and two P atoms from a chelating 1,1'-bis-(di-phenyl-phosphan-yl)cobaltocenium ligand, giving a three-legged piano-stool geometry. In the crystal, weak C-H⋯F hydrogen bonds link the complex cations and hexa-fluorido-phosphate anions into a three-dimensional supra-molecular structure.