ChemInform Abstract: Polynuclear Metal Complexes with Bridging Carbene or Carbyne Ligands. Part 100. Synthesis of Mixed‐Metal Compounds via the Salts (NEt4)(Rh(CO)L(η5‐C2B9H9R2)) (L: PPh3, R: H; L: CO, R: Me); Crystal Structures of the Complexes (WRhAu(μ‐CC6H4Me‐4)(CO)3(PPh3)(η‐C5H5)(η5‐C2B9H11)) and (WRh2Au2(μ3‐CC6H4Me‐4)(CO)6(η‐C5H5)(η5‐C2B9H9Me2)2)·0.5 CH2Cl2.

Abstract

The rhodacarbaborane salts (I) and (IV) are used to prepare the mixed‐metal complexes (III), (V), (VII), and (VIII).

Poly(imidazolyliden-yl)borato Complexes of Tungsten: Mapping Steric vs. Electronic Features of Facially Coordinating Ligands

“…To date, the tris(imidazolylidenyl)borate class of ligands has only been employed in monometallic systems; however, terminal carbyne ligands have an extensively documented propensity to support metal-metal bond formation, as championed by Stone [144]. In particular, the addition of gold(I) reagents to monometallic carbyne complexes [145][146][147][148][149][150][151][152][153][154][155] is of interest due to the tendency of the carbyne to adopt a semi-bridging rather than the more common symmetrical bridging geometry. This is considered to arise when the carbyne bridges electronically disparate metals, and therefore, the late high d-occupancy metal (d 10 gold(I) or platinum(0)) is considered to act as a σ-donor (Z-type metal-ligand bonding [156]) to the carbyne carbon.…”