Trinuclear mixed-metal gold-silver compounds are obtained by the reaction of gold(I) carbeniate [Au(μ-C(OEt)=NC6H4-p-CH3)]3, TR(carb), or gold(I) imidazolate [Au-μ-C,N-1-benzyl-2 imidazolate]3, TR(bzim), with silver(I) pyrazolate [Ag(μ-3,5-Ph2pz)]3. The crystalline products are mixed-ligand, mixed-metal dimeric products [Au(carb)Ag2(μ-3,5-Ph2pz)2], [Au2(carb)2Ag(μ-3,5-Ph2pz)]•CH2Cl2, [Au(bzim)2Ag2(μ-3,5-Ph2pz)], and [Au2(bzim)2Ag(μ-3,5-Ph2pz)]. They have been characterized by elemental analysis and 1H NMR and mass spectrometry. The X-ray structure of [Au-(carb)Ag2(μ-3,5-Ph2pz)2] shows it to be a dimer with two Ag•••Au contacts between the trinuclear units of 3.083(2) and 3.310(2) Å and with average intramolecular Ag•••Ag and Au•••Ag distances of ~3.3 and 3.2 Å, respectively.The structure of [Au2(carb)2Ag(μ-3,5-Ph2pz)]•CH2Cl2 is a dimer with one intermolecular Au•••Au attraction of 3.3354-(10) Å and a short Ag•••Au distance of ~3.42 Å and intramolecular Ag•••Au and Au•••Au contacts of ~3.2 and ~3.3 Å, respectively. Packing diagrams of both complexes show that the dimeric units are independent, similar to their parent molecules.
Gold(I) and Silver(I) Mixed-Metal Trinuclear Complexes: Dimeric Products from the Reaction of Gold(I) Carbeniates or Benzylimidazolates with Silver(I) 3,5-Diphenylpyrazolate.
GALASSI, Rossana;PAPA, Fabrizio;BURINI, Alfredo;
2006-01-01
Abstract
Trinuclear mixed-metal gold-silver compounds are obtained by the reaction of gold(I) carbeniate [Au(μ-C(OEt)=NC6H4-p-CH3)]3, TR(carb), or gold(I) imidazolate [Au-μ-C,N-1-benzyl-2 imidazolate]3, TR(bzim), with silver(I) pyrazolate [Ag(μ-3,5-Ph2pz)]3. The crystalline products are mixed-ligand, mixed-metal dimeric products [Au(carb)Ag2(μ-3,5-Ph2pz)2], [Au2(carb)2Ag(μ-3,5-Ph2pz)]•CH2Cl2, [Au(bzim)2Ag2(μ-3,5-Ph2pz)], and [Au2(bzim)2Ag(μ-3,5-Ph2pz)]. They have been characterized by elemental analysis and 1H NMR and mass spectrometry. The X-ray structure of [Au-(carb)Ag2(μ-3,5-Ph2pz)2] shows it to be a dimer with two Ag•••Au contacts between the trinuclear units of 3.083(2) and 3.310(2) Å and with average intramolecular Ag•••Ag and Au•••Ag distances of ~3.3 and 3.2 Å, respectively.The structure of [Au2(carb)2Ag(μ-3,5-Ph2pz)]•CH2Cl2 is a dimer with one intermolecular Au•••Au attraction of 3.3354-(10) Å and a short Ag•••Au distance of ~3.42 Å and intramolecular Ag•••Au and Au•••Au contacts of ~3.2 and ~3.3 Å, respectively. Packing diagrams of both complexes show that the dimeric units are independent, similar to their parent molecules.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
