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Three gold(I) saccharinate complexes of the type M[Au(Sac) 2 ] (M = Na, K and NH 4 ) 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. For M = 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, NH 4 , 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.

zeitschrift für naturforschung b

Synthesis, Solution Behavior, Molecular and Supramolecular Structures of the Water-soluble Gold(I) Saccharinate Complexes M[Au(Sac) 2 ] (M = Na, K, NH 4 )