The nature of alkyne oligomerization on the face of a mixed-metal trinuclear cluster

Transition Metal—Main Group Cluster Compounds

“…One pathway which, in terms of starting materials, might at first sight resemble those illustrated for boron in Figure 20 and for oxygen in Figure 85 of phenyl acetylene on the trimetal frame of the type 74 cluster CP2M02Ru( CO hS. (389,390) The first stage is to form a metal supported C 6 H 3 Ph3 fragment which, on heating to 125°C, cleaves to give two allyl ligands. (390) A difference in reactivity between clusters containing electron-rich or electron-deficient main group atoms is to be expected, and is nicely represented by reactions with Lewis bases.…”

“…(389,390) The first stage is to form a metal supported C 6 H 3 Ph3 fragment which, on heating to 125°C, cleaves to give two allyl ligands. (390) A difference in reactivity between clusters containing electron-rich or electron-deficient main group atoms is to be expected, and is nicely represented by reactions with Lewis bases. Competition between the metal and boron atoms in [HFe3(CO)9BH3r for Lewis bases was discussed in Section 2.1.…”

Deconstruction of cyclic and acyclic trithiocarbonates by C–S and CS bond cleavage during oxidative decarbonylation of dimolybdenum alkyne complexes †

“…Moreover the three previously recorded examples in which a similar C 3 R 3 ligand bridges a CpMo-MoCp bond, notwithstanding the fact that all form part of larger nuclearity clusters, all display the same phenomenon: solution equivalence of the Cp ligands, but asymmetric coordination of the dimetalla-allyl in the solid state. 14 This militates against the situation being merely due to crystal packing forces. 9 We therefore examined the reactions of heterocycles 6 (R = SMe) and 7 (R = SCOPh), prepared in this way, with 1.…”

Metal Telluride Clusters — From Small Molecules to Polyhedral Structures

“…The structure of the 74‐electron anion [ 15 ] − may be described by a slightly distorted Ru 5 square pyramid spanned by a μ 4 ‐Te ligand. Thus, it belongs to the class of [Ru 5 X(CO) 15 ] clusters (X = S, Se, Te), of which only [Ru 5 S(CO) 15 ] has been synthesized thus far 43. The triangular structure of [ 16 ] − is mainly composed of three edge‐linked Ru 3 Te tetrahedra, in close analogy to the structure of [Ru 6 HS 3 (CO) 15 ] − 44…”