Inorganic Chemistry, Vol.55, No.17, 8277-8280, 2016
Coinage Metal Pyrazolates [(3,5-(CF3)(2)Pz)M](3) (M = Au, Ag, Cu) as Buckycatchers
The synthesis and characterization of supramolecular assemblies {C-60[M-3](4)}(infinity) consisting of C-60 and coinage metal pyrazolates [M-3] (i.e., [(3,5-(CF3),Pz)-M](3), where Pz = pyrazolate and M = Au, Ag, and Cu) are reported. {C-60[CU3](4)}(infinity), {C-60[Ag-3](4)}(infinity) and {C-60[Au-3](4)}(infinity) form isomorphous crystals. The [M3] moieties adopt a concave conformation to complement the convex C60 surface. They exist as dimers of trimers (i.e., hexanuclear [M-3](2) units) that are held together by three close M...M metallophilic interactions at 3.1580(17), 3.2046(7), and 3.2631(7) angstrom for copper, silver, and gold systems, respectively. The [M-3](2) moieties surround each C-60 in a tetrahedral fashion, while each [M-3](2) is sandwiched by two C-60 molecules to form a supramolecular 3D assembly.