(Carbonyl-1κC)bis[2,3(η5)-cyclopentadienyl][μ3-(S-methyl trithiocarbonato)methylidyne-1:2:3κ4 C,S′′:C:C](triphenylphosphine-1κP)(μ3-sulfido-1:2:3κ3 S)dicobalt(II)iron(II) trifluoromethanesulfonate

The asymmetric unit of the title compound, [FeCo2(C5H5)2(C3H3S3)S(C18H15P)(CO)]CF3SO3, consists of a triangular irondicobalt cluster cation and a trifluoromethanesulfonate anion. In the cation, the FeCo2 triangle is symmetrically capped on one face by an S atom and on the other by a C atom linked to a methyl trithiocarbonate residue that bridges the Fe—C bond. Each Co atom carries a cyclopentadienyl ligand while the Fe atom coordinates to one carbonyl and one triphenylphosphine ligand. In the crystal structure, the cation is linked to the anion by a number of weak non-classical C—H⋯O and C—H⋯F hydrogen bonds and weak S⋯O (3.317 Å) and S⋯F (3.198 Å) interactions. The structure is further stabilized by additional intermolecular C—H⋯O, C—H⋯F and O⋯O (2.942 Å) contacts, together with an unusual S⋯π(Cp) interaction (S⋯centroid distance = 3.385 Å), generating an extended network.