Organogold compounds clusters

Only very few organogold compounds are colored. Spectroscopy in the visible region is therefore rarely used. Only a few groups of Au compounds and the ferrocenylgold(l) complexes have been investigated, and the results have not yet been evaluated in detail. UV absorption studies are also quite limited, except for some more recent luminescence and fluorescence (see Fluorescence) work on multinuclear complexes or clusters. 

One advantage of using phosphine organogold complexes or clusters is that they do not contain chlorides, but one drawback is that they must be synthesized, and handled with care because of toxicity. Moreover, depending on the nature of the compounds, they are more or less stable in air and light. 

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