Self-Assembled Silver Polyhedra with Embedded Acetylide Dianion Stabilized by Perfluorocarboxylate and 4-Hydroxyquinoline Ligands

Four new silver(I) double salts (L2H)4[Ag10(C2)(CF3CO2)12(L)2]·5H2O (1), [Ag8(C2)(CF3CO2)6(L)6] (2), [(Ag2C2)(AgC2F5CO2)6(L)3(H2O)]·H2O (3), and (L·H3O)2[Ag11(C2)2(C2F5CO2)9(H2O)2]·H2O (4) incorporating the hitherto unexplored
ligand 4-hydroxyquinoline (L) have been synthesized by the hydrothermal method. Compound 1 features an
unprecedented bicapped square-antiprismatic Ag10 silver cage with an embedded C22- moiety, whereas the discrete
supermolecule 2 bears a rhombohedral Ag8 core similar to that previously found in Ag2C2·6AgNO3. Compound 3
contains a discrete supramolecular complex whose core is a (C2)2@Ag16 double cage constructed from the edge-sharing of two monocapped square antiprisms, which is completely surrounded by 12 pentafluoropropionate, 6
4-hydroxyquinoline, and 2 aqua ligands. The layer structure in 4 is constructed from a sinuous anionic silver column
composed of fused irregular monocapped trigonal antiprisms each encapsulating a C22- dianion, with L·H3O+
species serving as hydrogen-bond connectors to adjacent columns.