NEW ORGANOGOLD COMPLEXES: TETRAPHENYLCYCLOPENTADIENE DERIVATIVES

Article abstract of DOI:10.1016/S0022-328X(00)93456-9

Mono- and diaurated derivatives of tetraphenylcyclopentadiene, Ph4C5HAuPPh3 and Ph4C5(AuPPh3)2, have been obtained by auration of tetraphenylcyclopentadiene with tris(triphenylphophinegold)oxonium tetrafluoroborate.Under the action of ⁺BF4^- both mono- and diaurated derivatives form the trinuclear cationic complex ⁺BF4^-, which is converted into Ph4C5(AuPPh3)2 when treated with nucleophiles.The structure of Ph4C5HAuPPh3 and ⁺BF4^- was established by IR, UV, PMR spectral and X-ray structural studies.Ph4C5HAuPPh3 has a C-Au bond and additional coordination of Au with two neighboring carbon atoms of the five-membered ring; the structure is non-fluxional.The complex ⁺BF4^- includes rather rare structural moieties: a three-membered carbometal cycle , three gold atoms linked to each other, Au-Au-Au, and univalent gold coordinated with three carbon atoms of the Ph4C5 ring.