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.

Synthesis, Solution Behavior, Molecular and Supramolecular Structures of the Water- soluble Gold(I) Saccharinate Complexes M[Au(Sac)2] (M = Na, K, NH4) / Cinellu, Maria Agostina; Maiore, Laura; Schier, A; Schmidbaur, H; Rossi, D.. - In: ZEITSCHRIFT FÜR NATURFORSCHUNG. B, A JOURNAL OF CHEMICAL SCIENCES. - ISSN 0932-0776. - 63B:(2008), pp. 1027-1034.

Synthesis, Solution Behavior, Molecular and Supramolecular Structures of the Water- soluble Gold(I) Saccharinate Complexes M[Au(Sac)2] (M = Na, K, NH4)

CINELLU, Maria Agostina;MAIORE, Laura;
2008

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 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.
Synthesis, Solution Behavior, Molecular and Supramolecular Structures of the Water- soluble Gold(I) Saccharinate Complexes M[Au(Sac)2] (M = Na, K, NH4) / Cinellu, Maria Agostina; Maiore, Laura; Schier, A; Schmidbaur, H; Rossi, D.. - In: ZEITSCHRIFT FÜR NATURFORSCHUNG. B, A JOURNAL OF CHEMICAL SCIENCES. - ISSN 0932-0776. - 63B:(2008), pp. 1027-1034.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11388/82797
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