Heterometallic boride clusters: formation of octahedral [M₂Ru₄(CO)₁₆B]^–(M = Rh or Ir) and gold(I) phosphine derivatives. Crystal structures of [N(PPh₃)₂][trans-Ir₂Ru₄(CO)₁₆B], trans-[Rh₂Ru₄(CO)₁₆B{µ₃-AuP(C₆H₁₁)₃}] and cis-[Ir₂Ru₄(CO)₁₆B{µ-AuP(C₆H₁₁)₃}]

Formation of direct metal–metal bonds from 16-electron “pseudo-aromatic” half-sandwich complexes Cp″M[E2C2(B10H10)]

“…The metal atoms of the core adopt a nearly planar Ir 2 Rh 2 arrangement, which is rare to our knowledge. 44 The two dithiolato ligands of carboranes are situated at the both sides of the tetra-metallic plane with three sulfur atoms acting as m 2 -bridging ligands and one sulfide simultaneously connecting three metals. If COD is considered as a bidentate ligand, Rh(1) and Rh(2) metals both exhibit six-coordinate environments, and Ir(1) shows a similar coordination sphere of that in 54a with a three-legged piano-stool configuration.…”

The First 8-Vertex Monocarbon Metallacarborane with an “Isolated” Boron-Capped Pentagonal Bipyramidal Cage. Synthesis and Molecular Structure of Cappedcloso-2,2-(Ph3P)2-2-H-3,6,8-(MeO)3-RuCB6H4

“…The Ru(2)−B(8) bond 1.961(5) Å happens to be the shortest Ru−B bond ever observed in ruthenium complexes of any boron derivatives. It is about 0.25 Å shorter than the average bond length calculated across all reported Ru−B distances (689 values retrieved from 161 structures with Ru−B bonds of any type found in the Cambridge Structural Database; Release April 2000) and still noticeably shorter than the shortest Ru−B distance of 1.993 Å previously observed in the mixed-metal cluster Cy 3 PAuIr 2 Ru 4 B(CO) 16 featuring the interstitial boron atom in the center of the Ir 2 Ru 4 octahedron. Interestingly, the shortest ever recorded Fe−B distance is the distance from a similar capping boron vertex to the central iron atom in the electron-deficient complex [Me 4 C 4 B 8 H 8 FeCo(η 5 -Cp)] 7 mentioned above.…”

Synthesis and Characterization of New Ruthenium−Iridium Mixed-Metal Clusters. Crystal Structures of [Ru3IrH3(CO)11(PPh3)], [Ru3IrH(CO)12(PPh3)], and [Ru4-xIrxH4-x(CO)10(PPh3)2] (x = 1 and 2)

“…Structural information is available only for one anionic cluster, [RuIr 3 (CO) 12 ] - , and for the phosphine complex [Ru 3 IrH 2 (CO) 8 (PPh 3 )(μ-PPh 2 )(PPhC 6 H 4 )] and cis -[Ru 4 Ir 2 (CO) 16 B(μ-AuP(C 6 H 11 ) 3 )] cages …”