Metal-Gold Phosphine Cluster Compounds

MIXED-METAL-GOLD PHOSPHINE CLUSTER COMPOUNDS 

Transition metal hydride complexes are important starting materials for reactions with [Au(PPh3)] . The foundation for this method is the isolobal relationship between [AulPPhj)] and Although many examples 

For the following synthetic strategies, all manipulations are carried out under a purified N2 atmosphere with use of standard Schlenk techniques. P NMR spectra are run with proton decoupling and are reported in ppm relative to internal standard trimethylphosphate (TMP), with positive shifts downfield. Compound concentrations used in the conductivity experiments are 3 X 10 M in CH3CN. All solvents are dried and distilled prior to use. 

The following is adapted from the procedure described by L. Malatesta and is carried out without the use of an inert atmosphere. A solution of 

The white crystals of Au(PPh3)N03 are light- and temperature-sensitive soluble in acetone, tetrahydrofuran, chloroform, and dichloromethane and insoluble in alcohols and saturated hydrocarbons. Samples may be stored in the dark in a refrigerator for extended periods of time. P NMR (dichloromethane, 25°) d 25.0 (s). IR (KBr) v(N03) 1495, 1268 cm . 

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Mixed-Metal-Gold Phosphine Cluster Compounds 279... 

MIXED-METAL-GOLD PHOSPHINE CLUSTER COMPOUNDS... 

The addition of gold phosphine fragments to transition metal compounds is readily extended to include reactions of heteronuclear gold cluster compounds and has been used to build up clusters of increasing nuclearity, as the following examples illustrate ... 

Another area of major interest in the field is that of mixed metal cluster systems. Hieber very early in the study of metal carbonyl chemistry was able to prepare mercury complexes of the type Fe(CO)4(HgCl)2. The related gold ° compounds were prepared in the 1960s by reaction of phosphine gold halides with carbonyl anions. 

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