Synthesis, solution behavior, molecular and supramolecular structures of the water-soluble gold(I) saccharinate complexes M[Au(Sac)2] (M = Na, K, NH4)

Maria Agostina Cinellu, Laura Maiore, Annette Schier, Hubert Schmidbaur, Davide Rossi

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Abstract

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 MeOH-acetone. 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, 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.

Original languageEnglish
Pages (from-to)1027-1034
Number of pages8
JournalZeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
Volume63
Issue number9
DOIs
StatePublished - Sep 2008
Externally publishedYes

Keywords

  • Gold Complexes
  • Gold Plating
  • Saccharinate Complexes

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