“…We have been interested in the reactions of low-valent transition-metal clusters that contain oxophilic main group elements such as tin and antimony for over a decade. 10,14,15 Recently, we have reported our results on several di- and trirhenium complexes containing up to three antimony donor ligands from the reactions of [Re 2 (CO) 9 (NCMe)] and [H 3 Re 3 (CO) 11 (NCMe)] with SbPh 3 . 10 In continuation of our work on the reactivity of triorganostibines with transition metal clusters, we have examined the reactions of the diphosphine-substituted triosmium clusters [Os 3 (CO) 10 (μ-dppm)] and [HOs 3 (CO) 8 {μ 3 -Ph 2 PCH 2 PPh(C 6 H 4 -μ 2 ,σ 1 )}] with SbPh 3 .…”