Silver ethynide clusters constructed with fluorinated β-diketonate ligands

A fluorinated beta-diketonate hexafluoroacetylacetone ligand has been employed to construct eight new silver ethynide clusters. Single crystal X-ray analysis revealed that complexes 1-8 are functionalized by hexafluoroacetylacetones as terminal ligands. In compounds 3-8, different kinds of silver ethynide cluster shells enclose various templates, respectively. In 7 and 8, the tert-butylphosphonate ligand functions as a tripodal strut to support the vertex-sharing or fusion of two small silver(I) clusters to form an enlarged composite cluster.