Supramolecular Assembly of Trimeric Gold(I) Pyrazolates through Aurophilic Attractions
作者:Guang Yang、Raphael G. Raptis
DOI:10.1021/ic026051+
日期:2003.1.1
The supramolecular architecture of trinuclear gold(l) pyrazolato aggregates is held together by intermolecular aurophilic attractions, sterically governed by the substituents on the pyrazole rings. A two-dimensional network of [Au(mu-pz)](3) complexes, 1 (pz = pyrazolato anion, C3H3N2-), and a large intricate aggregate of 16 [Au(mu-4-Me-pz)](3) complexes in 2 have been determined crystallographically. Under UV irradiation at ambient temperature, solid samples of 1 and 2 luminesce with lambda(max) = 626 and 631 cm(-1), respectively, attributed to intermolecular Au...Au aurophilic contacts.
Dinuclear gold(III) pyrazolato complexes – Synthesis, structural characterization and transformation to their trinuclear gold(I) and gold(I/III) analogues
作者:Guang Yang、José R. Martínez、Raphael G. Raptis
DOI:10.1016/j.ica.2008.07.028
日期:2009.4
The reaction of AuCl(3)py with Na(pz*) (pz* = pyrazolato, or substituted pyrazolato anion) yields stable dinuclear [cis-(AuCl2)-Cl-III(mu-pz*)](2) complexes. In the presence of a base, the latter undergo reduction with concomitant transformation of the dinuclear Au-2(III)-structure to trinuclear (Au2AuI)-Au-III, (AuAu2I)-Au-III (containing trans (AuCl2)-Cl-III-centres) and Au-3(I) species. (C) 2008 Elsevier B. V. All rights reserved.