Abstract
The structure of the complex Na 3[Au(S 2O 3) 3) 2],2H 2O has been determined by three-dimensional X-ray diffraction at room temperature. It forms crystals of space group P2 l c with a unit cell of dimensions a = 5·44, b = 11·36, c = 18·23 A ̊ and β = 97° 57′ , containing four molecules. The atoms were located from three-dimensional Patterson and difference Fourier maps, and the structure refined by full matrix least-squares, to R = 0·085 for 1813 measured independent reflections. Co-ordination around the gold atom is linear, with the thiosulphate group bonded through sulphur; AuS distances being 2·265 and 2·279 Å respectively. The structure presents of a short Au…Au distance (3·30 Å). There is evidence of the presence of intermolecular OH…O and O…S hydrogen bonds.
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