Bi-, tetra-, and poly-nuclear complexes of gold(I) and silver(I) with bis(diphenylphosphino)-methanide or -amide acting as six-electron donors

A briefing on aurophilicity

“…Catenanes, Borromean rings and rotaxanes. Macrocycles containing several gold atoms may not only reach a maximum of intramolecular aurophilic bonding by appropriate folding, but also by threading one ring through the other to form catenanes (35). This phenomenon was first observed by the groups of Mingos 95 and Puddephatt 96 using different substrates.…”

“…4.1.1 Non-cyclic polynuclear complexes of flexible polyfunctional ligands. The 2 : 1 complexes of bis(diorganophosphino)methanes (13a), 16,31 -cyclopropanes (13b), 32 -ethylenes-(1,1) (13c), 33 phosphonium-methylides (13d), 34 -methylides (13e), 35 carbonyl-bis(phosphoniummethylides) 36 or amines and amides (13f,g) 37,38 are protypes of this family of compounds (10b). Most of the examples have halide anions (X = Cl, Br, I) attached to the gold centres, but phenyl derivatives such as (dppm)(AuPh) 2 show the same phenomena.…”

Base-assisted synthesis of 4-pyridinate gold(i) metallaligands: a study of their use in self-assembly reactions

“…Alternatively, a more rational route was explored starting from the preformed tetranuclear [(AuCl) 2 (CH) 2 (µ 2 -Au(PPh 2 ) 2 )]. 17 We attempted to introduce in the latter the 4-pyridine fragment by a base-assisted transmetallation with 4-pyridylboronic acid or by the classical reaction with 4-pyridyllithium. Again, the resulting reactions were not clean and the desired product was only obtained in a very low yield.…”

Synthesis and Uses of Organogold Compounds

“…An example is shown in Scheme 5 197,198 The product thus obtained undergoes oxidative addition of halogens, leading to unusual tetranuclear species, which give cationic complexes by substitution of the halogen atoms by a neutral ligand ( Figure 8) 199 -202 .…”