19F, 1H-HOESY and PGSE NMR Studies of Neutral Trinuclear Complexes of AuI and HgII: Evidence for Acid−Base Stacking in Solution
- 6 April 2002
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 124 (17) , 4570-4571
- https://doi.org/10.1021/ja0174837
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(μ-C2,N3-bzim)]3 (bzim = 1-benzylimidazolate), 1, and [Au(μ-C,N-C(OEt)N-p-C6H4-CH3)]3, 2, on one hand, and the trinuclear cyclic HgII acid complex [Hg(μ-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.Keywords
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