Dinuclear dicationic gold complexes containing amide-functionalized bis(NHC) ligands exhibit aurophilic interactions in the presence of halogen counterions, as shown in compounds 5 and 6. DFT calculations confirmed the stability of these geometries and predicted longer gold•••gold distances in the absence of halogen anions. This was confirmed by employing a “non-interactive” anion like tetraphenylborate in complex 8. Both types of complexes were unambiguously characterized by X-ray analysis. Furthermore, only complexes 5 and 6 containing the halogen anions are luminescent in the solid state and in a water matrix at 77 K.
C. Hemmert, R. Poteau, F. J.-B. dit Dominique, P. Ceroni, G. Bergamini, H. Gornitzka (2012). Amide Functionalized Bis(NHC) Systems - Anion Effect on Gold-Gold Interactions. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, -, 3892-3898 [10.1002/ejic.201200323].
Amide Functionalized Bis(NHC) Systems - Anion Effect on Gold-Gold Interactions
CERONI, PAOLA;BERGAMINI, GIACOMO;
2012
Abstract
Dinuclear dicationic gold complexes containing amide-functionalized bis(NHC) ligands exhibit aurophilic interactions in the presence of halogen counterions, as shown in compounds 5 and 6. DFT calculations confirmed the stability of these geometries and predicted longer gold•••gold distances in the absence of halogen anions. This was confirmed by employing a “non-interactive” anion like tetraphenylborate in complex 8. Both types of complexes were unambiguously characterized by X-ray analysis. Furthermore, only complexes 5 and 6 containing the halogen anions are luminescent in the solid state and in a water matrix at 77 K.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
