The reaction of {(Ph(3)P)AuO-3}(BF4-)-B-+ with Me(3)SiCHN(2) gives d
initrogen and three crystalline products, two of which have been ident
ified as {Ph(3)PCHAu(PPh(3))(2)}(BF4-)-B-+(1) and {HCAu(PPh(3))(4)
}(BF4-)-B-+(2). In crystals of 2.4CH(2)Cl(2), the cation has a square
pyramidal structure with an apical hydrogen atom at a central pentacoo
rdinate carbon atom. The cations are associated to centrosymmetrical d
imers with auriophilic contacts.