1415012-54-2Relevant academic research and scientific papers
Substituent effects on the supramolecular aggregation of Ag I-pyrazolato trimers
Yang, Guang,Baran, Peter,Martinez, Angel R.,Raptis, Raphael G.
, p. 264 - 269 (2013/03/14)
The interplay of argentophilic and dipolar (π-acid...base) interactions, on one hand, and the presence or absence of interstitial solvent molecules, on the other, determines the supramolecular organization of trinuclear silver-pyrazolato complexes in the solid state. The crystal structures of one gold and six silver metallacyclic complexes of the type [MI(μ-pz*)]3, where pz* are the substituted pyrazolato anions 3,5-Ph2-pz, 3-Me-5-Ph-pz, 4-Br-3,5-Ph 2-pz, 4-Br-3-tBu-pz and 3-(o-Cl-C6H 4)-pz and M = Ag and Au, are discussed in the context of their supramolecular organization. Two silver complexes, for which the π-acid character of their Ag3-faces is maximized by their peripheral electron-withdrawing substituents, show crystal packing dominated by short Ag3...Br contacts, the first structural manifestation of supramolecular structure via dipolar interactions involving the tunable π-acidity of the Ag3-face.
