title: 19F, (1)H-HOESY and PGSE NMR studies of neutral trinuclear complexes of Au(I) and Hg(II): evidence for acid-base stacking in solution.
abstract: By combining the information from 19F, 1H-HOESY and PGSE NMR methodologies, unprecedented direct evidence has been obtained for the formation of supramolecular assemblies in solution between the trinuclear cyclic AuI basic compounds ([Au(mu-C2,N3-bzim)]3 (bzim = 1-benzylimidazolate), 1, and [Au(mu-C,N-C(OEt)=N-p-C6H4-CH3)]3, 2, on one hand, and the trinuclear cyclic HgII acid complex [Hg(mu-C,C-C6F4)]3, 3, on the other hand. HOESY experiments indicate that a stacking similar to that observed in the solid state occurs. PGSE studies demonstrate the presence of an equilibrium between the free trinuclear entities and adduct A in the case of 2/3 admixtures (see Sketch) while for 1/3 admixtures, adducts A and B are mainly present in solution.
authors.affiliation: Dipartimento di Scienze Chimiche, University of Camerino, Via S. Agostino, 1-062032 Camerino, Italy.
authors.forename: Alfredo
authors.initials: A
authors.lastname: Burini
authors.forename: John P
authors.initials: JP
authors.lastname: Fackler
authors.forename: Rossana
authors.initials: R
authors.lastname: Galassi
authors.forename: Alceo
authors.initials: A
authors.lastname: Macchioni
authors.forename: Mohammad A
authors.initials: MA
authors.lastname: Omary
authors.forename: Manal A
authors.initials: MA
authors.lastname: Rawashdeh-Omary
authors.forename: Bianca R
authors.initials: BR
authors.lastname: Pietroni
authors.forename: Stefano
authors.initials: S
authors.lastname: Sabatini
authors.forename: Cristiano
authors.initials: C
authors.lastname: Zuccaccia