Au l Complexes

These complexes have been iuUy characterized by analytical and spectroscopic techniques and also studied using quantum chemical calculations. The molecular stmcture of dinuclear complex 101 has been determined by 

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Figure 44 IS/QS relationship (IS = isomer shift and QS = quadrupole splitting) for complexes 115a and 115b (red triangles), representative phosphine Au(l) complexes (green squares) and Au(lll) (blue rhombuses) complexes. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this chapter.)...

The gold-catalyzed oxidation of alcohols is a less-explored field. In one example, oxygen was used as the oxidant and the authors take advantage of the coordination of benzylic alcohols to an Au(l)-complex generated in situ from AuCl and a diamine anionic ligand. ... 

The Au—L bond lengths also depend on the type of complex. In XAuL complexes (Table 9), when the ligands are NH3 or H2O the Au-L distances are greater than in the Au—L+ complexes (Table 1) for all the anions except F (which lengthens the Au—L bond distance). When L = PH3 or H2S the anions of F, Cl, OH shorten the Au-L distance in comparison to their value in Au—L+ complexes, but the SH and CN anions lengthen this bond. The maximum change in the bond length as a result of the presence of X is about 0.07 A. 

MC transitions from nd to (n +1) s orbitals are not easily identified. Such absorptions occur at relatively high energies where they maybe obscured by bands of different origin. Fortunately, in d ° complexes LF transitions do not exist and the identification of the ds transitions is facilitated. Some linear Au(I) complexes indeed show ds absorptions as their longest-wavelength bands [46,47]. At low temperatures in glassy solutions or in the solid state even at room temperature a few Au(l) complexes have been shown to emit from these ds excited states (Fig. 2) [48],e.g.,... 

C-3 Au(l) complexes 59-61 have nearly linear P-Au-C configuration. The intermolecular... 

Scheme 26 (a) Enhanced stereoselectivity for the hydroamination reaction using the chiral bimetallic Au(l) complex (70-(>S)) containing an Au-Au interaction compared to the noninteracting hi- and monometallic Au complexes (66 and 71), and (h) proposed bimetallic Au(I) activation of the substrate through favorable alignment... 

Scheme 11.9 Molecular structure of Au(l) complexes for cell imaging.

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