Reaction of the chalcogen stabilised butterfly cluster Fe2(CO)6μ-SeC(H)=C(Ph)Se with Ru3(CO)12occurs under thermal conditions affording the clusters FeRu2(CO)9(μ-Se)2 (2), closo-Ru4(CO)12(μ4,η2-HC2Ph) (3) and closo-Ru4(CO)9(μ-CO)2(μ4,η2-HC2Ph)(μ4-Se) (4) in 30%, 22% and 18% yield respectively. They were characterised by IR and 1H, 13C and 77Se NMR spectroscopy. Compound 3 was further characterised by X-ray methods: space group P21/n, a = 20.138(4), b = 9.333(2), c = 26.219(6) Å, β = 97.43(2)°, Z = 8, ρcalc = 2.291 g cm-3. The structure was solved using direct methods and was refined to the final values of the residuals R = 0.0377 and Rw = 0.0455. The molecule consists of a butterfly arrangement of four ruthenium atoms with a quadruply bridged alkyne ligand. Compound 4 was characterised by comparison of its spectroscopic data with that of the analogous S-compound.