Supramolecular assembly of trimeric gold(I) pyrazolates through aurophilic attractions.
The supramolecular architecture of trinuclear gold(I) 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.
Yang
Guang
G
Department of Chemistry, University of Puerto Rico, Rio Piedras Campus, P.O. Box 23346, San Juan, Puerto Rico 00931.
Raptis
Raphael G
RG