Ylide-gold complexes

Thiols like pyridine-2-thiol yield (carbene)gold thiolates, and onium salts give cationic (carbene)gold ylide complexes, isolated and characterized as the perchlorates.170 The reaction of dithiocatechol with (cyclohexylisocya-nide)gold chloride affords a carbene complex [(CyNC)AuC(NHCy)2]+Cl-, which co-crystallizes with a neutral tetranuclear complex [(CyNCAu)2Au2(S2C6H4)2].224... [Pg.287]

Figure 2. Reactions of dinuclear gold ylide complexes.

As a final example, the reaction of a binuclear gold ylide complex with methyl iodide afforded (48, 56), a formal gold(II) center having three gold-carbon bonds [Eq. (80)]. [Pg.78]

Schmidbaur and co-workers (83-90a, 92,93). In cyclic gold-ylide complexes (3), formed by a transylidation reaction (87), the two Au atoms have a parallel two-coordinate linear arrangement of ligands [Eq. (6)]. [Pg.255]

SCHEME 16. Preparation of mixed-valent gold ylide complexes from a digold(II) precursor... [Pg.270]

A related dinuclear species 77, recently described, constitutes the first dinuclear gold(I) complex with heterobridged phosphor-1,1 -dithiolato moieties and bis(ylide) bridging ligands [ 102]. It is obtained by reaction between [ AuS2PPh2] and the diylide gold complex 74 (R=Me). No intermolecular Au-Au interaction is observed in 77 but the oxidative addition of chlorine to the product leads to a new complex 78 in which a single bond is formed between the two Au(II) centers (Scheme 26). [Pg.61]

Gold(I) ylides are oxidized in 0.1 M [Bu4N]BF4/THFat low potentials of +0.11 and + 0.23 V vs. Ag/AgCl (quasi-reversible). The dinuclear amidinate oxidizes under the same conditions at + 1.24 V vs. Ag/AgCl (reversible). These large differences in chemical character of the dinuclear gold(I) complexes appear to explain the widely different behavior of these compounds and especially toward the reaction with mercury cyanide. [Pg.15]

Neutral ylide, isocyanide and carbene pentafluorophenyl gold] 111) complexes with the general formulae trans-[Au]C6F5)X2]CH2PR3)[ ]PR3 = PPh3, PPh2Me, PPhMe2),... [Pg.131]

Table 3.14 shows all the known dinuclear gold(II) complexes containing the AU2" core. As happened in gold(II) chemistry the most abundant are those containing a double bridge of the bis ylide CH2PPh2CH2. The first derivative [(C6F5)Au... [Pg.156]

Uson, R., Laguna, A., Laguna, M. and Uson, A. (1983) A new route for the synthesis of gold(I) and gold(III) pentafluorophenyl(ylide) complexes. Inorganica Chimica Acta, 73(1),... [Pg.167]

Romeo, L, Bardaji, M., Concepcion Gimeno, M. and Lagrma, M. (2000) Gold(I) complexes containing the cationic ylide ligand bis (methyldiphenylphosphonio) methylide. Polyhedron, 19(15),... [Pg.168]

Trzcinskabancroft, B., Knachel, H., Dudis, D., Delord, T.J. and Marler, D.O. (1985) Experimental And Theoretical-Studies Of Dinudear Gold(I) And Gold(II) Phosphorus Ylide Complexes - Oxidative Addition, Halide Exchange, And Structural-Properties Including The Crystal And Molecular-Structures Of [Au (CH2)2PPh2]2 And [Au(CH2)2PPh2]2(CH3) Bri. Journal of the American Chemical Society, 107(24), 6908-6915. [Pg.180]

Schmidbaur, H., Hartmann, C., Riede, J.. Huber, B. and Muller, G. (1986) Alkylation Of Methylene-Bridged And Ylide-Bridged Binuclear Gold(III) Complexes. Organometallics, 5(8), 1652—1656. [Pg.180]

Scheme 11 Gold(III) and mixed Gold(I)/Gold(III) ylide complexes.

Other heteropolynuclear gold(II) complex that can be obtained by replacement of halide groups in bis(ylide)gold(II) species by other anionic nucleophilic metal complex is the tin derivative [Au2 Sn[N(p-Tol)SiMe2]3SiMe 2 M-(CH2)2PPh2 2] (350).2041... [Pg.1024]

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