Ferrocene-containing tri- and tetranuclear cyclic copper(i) and silver(i) pyrazolates

New tri- and tetranuclear macrocyclic silver(i) and copper(i) 3-ferrocenyl-5-(trifluoromethyl)pyrazolates were prepared: [{(3-((eta(5)-C5H4)Fe(eta(5)-C5H5))-5-(CF3)-Pz}M](3) (M = Cu (1), Ag (2)) and [{(3-(( eta(5)-C5H4)Fe(eta(5)-C5H5))-5-(CF3)-Pz}Cu](4) (3). The structures of compounds were established by X-ray diffraction analysis. In the crystalline state, a planar trinuclear silver-containing macrocycliN pyrazolate and a saddle-shaped tetranuclear copper-containing macrocycle are formed. The introduction of a bulky substituent, ferrocene, into the pyrazole ligand results in complete shielding of the acidic metal sites, which precludes the coordination of base molecules.