Coupling of Cyclometalated Phenylphosphanes in Dinuclear Gold(II)‐Complexes

Some recent highlights in gold chemistry

“…Au interactions. In contrast, the structures of the related gold complexes with shorter or longer chain diphosphines show intra-(n = 1) or intermolecular metal-metal interactions and form discrete (29), that form a chain of four metal atoms, where unexpectedly the sequence of formal charges is -++-, +--+ or +--+, respectively, which is clearly a variance with the simple rules of Coulomb forces (51). The self-assembly reaction of oligomeric digold(I) diacetylides [{(AuCϵCCH2OC6H4)2X}n] with diphosphines Ph2P(CH2)nPPh2 leads to the synthesis of organometallic catenanes.…”

Fundamental Elementary Steps in Gold Chemistry

“…Bennett et al [79][80][81] reported on biphenyl formation stemming from reductive elimination at a dinuclear cyclometallated gold(II)-gold(II) complex (Scheme 3.26). The reaction is supposed to proceed via a migration step to position both aryl ligands on the same gold atom, followed by CC bond coupling.…”

Synthesis and Uses of Organogold Compounds

“…The available synthetic methods allow the preparation of complexes with a diverse range of ligands L, including tertiary phosphines, amines, isocyanides, tetrahydrothiophene, and tertiary arsines. Difunctional phosphines such as bis(diphenylphosphino)amine give the corresponding dinuclear arylgold(I) complexes 91,92 , and a dimeric orthometallated phenylphosphine complex of formula [Au 2 fC 6 H 4 (PPh 2 )g 2 ] has also been prepared 93 . Both types of complexes undergo two-centre oxidative addition reactions reminiscent of those described for the structurally related gold(I) ylide complexes (see below).…”

“…A similar methodology is applicable with isothiazolyl lithium. In the product the nitrogen atom occupies a position remote from the coordinated carbon (equation 93) 412 …”