Tridentate κ-,, iridium complexes: influence of ligand saturation on intramolecular C-H bond activation.

Whereas κ-,,-based donor ligands are ubiquitous across synthetic chemistry, related unsymmetric systems having κ-,,-coordination are comparatively rare. In this contribution, we expose a new κ-,, ligand system, bearing a C3-anionic linker and its coordination chemistry with iridium. The title ligand has been coordinated in saturated and unsaturated forms.

Competitive gold/nickel transmetalation.

Transmetalation is a key method for the construction of element-element bonds. Here, we disclose the reactivity of [Ni(Ar)(I)(diphosphine)] compounds with arylgold(I) transmetalating agents, which is directly relevant to cross-coupling catalysis. Both aryl-for-iodide and unexpected aryl-for-aryl transmetalation are witnessed.