Synthesis of Gold(I), Gold(III), and Silver(I) Complexes with Ylide Ligands Derived from Carbonylbis(methylenetriphenylphosphonium) Diperchlorate. Crystal and Molecular Structures of [Au2{μ-{{CHPPh3)}CO}}2](ClO4)2, [(Ph,PCCl2)sCO][AuCl4](ClO4), [(AuL)2{μ-{C(PPh3)C(O)CH(PPh3)(AuL)}}](ClO4)2(L = PPh3), and [{Au(PMe2Ph)}4{μ-{{C(PPh3)}2CO}}](ClO4)2

1. Vicente, J.
2. Chicote, M.-T.
3. Saura-Llamas, I.
4. Jones, P.G.
5. Meyer-Bäse, K.
6. Erdbrügger, C.F.