Cinellu, Maria Agostina and Maiore, Laura and Schier, Annette and Schmidbaur, Hubert and Rossi, Davide (2008) Synthesis, solution behavior, molecular and supramolecular structures of the water-soluble gold(I) saccharinate complexes M[Au(Sac)2] (M = Na, K, NH4). Zeitschrift für Naturforschung. B: A Journal of Chemical Sciences, Vol. 63b (9), p. 1027-1034. ISSN 0932-0776. Article.
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Three gold(I) saccharinate complexes of the type M[Au(Sac)2] (M = Na, K and NH4) have been prepared by treatment of Au(tht)Cl (tht = tetrahydrothiophene) with saccharine and MOH in MeOHacetone. The compounds are very stable in the solid state but moderately soluble and of limited stability in water. Single crystal X-ray diffraction analysis of the three compounds revealed a linear coordination of the gold atom by the two N-bonded saccharinato ligands. ForM = Na, the two heterobicyclic ligands are roughly coplanar with a cis orientation of the two carbonyl groups which allows for a chelation of the sodium cation. For M = K, NH4, the ligands form large dihedral angles with a trans orientation of the donor sites out of which the potassium cations are coordinated in bridging positions between neighboring anions, and the ammonium ions are hydrogen-bonded, respectively.
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