Inorganic and Metal-Organic Compounds of Gold

Mossbauer studies on gold compounds were first reported by Roberts et al. [337] and Shirley et al. [338, 339]. They observed rather large isomer shift changes in some simple gold (I) and gold (III) halides and in halogeno-complexes such as AuX (X = Cl, Br, I), AuXj (X = F, Cl), K[AuX4] (X = F, Cl, Br), and 

In 1970, Charlton and Nichols [340] published their results of a Au Mossbauer study on 31 gold complexes, for which they describe a general correlation between Mossbauer parameters and chemical features. They investigated the series 

LAuCl3(L = (C6F5)Ph2P, Phj As, C5H5N, Me2S, and 

The range of isomer shifts and quadrupole splittings is larger than that for tin and iron. 

The range of isomer shifts is larger for aurous, Au(l), than for auric, Au(lll), compounds, most probably due to the larger amount of -character in sp than in dsp hybrid orbitals, and also to the smaller variety of ligands in the auric compounds under study. 

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