Reactions of the heterobimetallic complexes [(OC) 3{(MeO) 3Si} Fe(μ-PPh 2)P t(PPh 3) 2] ( 1) and [(OC) 3{(MeO) 3Si} Fe(μ-PR 2)P t(1,5-COD)] ( 3a, R Ph) with HBF 4·Et 2O result in cleavage of the FeSi bond and formation of the dihydrido complexes [(OC) 3 Fe(μ-PPh 2)(μ-H) 2P t(PPh 3) 2] [BF 4] ( 2) and [(OC) 3] Fe(μ-PR 2)(μ-H) 2P t(1,5-COD)] [BF 4] ( 4), respectively. Reactions of 3a or 3b (R Cy) with [(Ph 3P)Au] [PF 6] required 2 equiv. of the electrophile to give the clusters [(OC) 3 Fe(μ-0PR 2) {μ-Au(PPh 3)}{ 2P}t(1,5-COD)][PF 6] ( 5a, R Ph; 5b, R Cy). These were fully characterised and the structure of 5b was determined by X-ray diffraction: crystals are monoclinic, space group P2 1/ n, a = 22.479(6), b = 26.781(8), c = 10.254(3) Å, β = 102.94(2)° U = 6016.1 Å 3 and Z = 4. This is the first structural determination of a heterobimetallic complex carrying two Au-fragments. The FePt bond (2.715(3) Å) is bridged by a μ-PCy 2 group and by two Au(PPh 3) fragments. No Au-Au interaction is observed (4.333(1)Å).