Reactions of the tetranuclear mixed-metal clusters ReM3(CO)13(µ3-thpymS) (1, M = Os; 2, M = Ru; thpymSH = tetrahydropyrimidine-2-thiol) with PPh3 are examined. At room temperature reaction between 1 and PPh3 in the presence Me3NO leads to the formation of mono- and bis-phosphine substituted clusters ReOs3(CO)12(PPh3)(µ3-thpymS) (3) and ReOs3(CO)11(PPh3)2(µ3-thpymS) (4). Cluster 3 also reacts with PPh3 under similar conditions to give 4. In contrast, a similar reaction between 2 and PPh3 furnishes only the mono-phosphine substituted clusters ReRu3(CO)12(PPh3)(µ3-thpymS) (3). All the new clusters have been characterized by analytical and spectroscopic data together with single crystal X-ray diffraction for 1, 3 and 5.
Md.R. Moni, Md.J. Mia, S. Ghosh, D.A. Tocher, S.M. Mobin, T.A. Siddiquee, S.E. Kabir, "Investigation on the reactivity of tetranuclear Group 7/8 mixed-metal clusters toward triphenylphosphine", Polyhedron, Volume 146, 2018, Pages 154-160, ISSN 0277-5387, https://doi.org/10.1016/j.poly.2018.02.026.