Ring, polymer and network structures in silver(i) complexes with dipyridyl and diphosphine ligands

Abstract

Interesting molecular architectures are obtained by self-assembly from silver(I) trifluoroacetate with a combination of the diphosphine ligands [Ph₂P(CH₂)_nPPh₂, n = 1–6] and trans-1,2-bis(4-pyridyl)ethylene (bipyen); in complexes with stoichiometry Ag₂(O₂CCF₃)₂{Ph₂ P(CH₂)_nPPh₂}(bipyen), the complexes crystallize in the form of macrocyclic rings [Ag₄(O₂CCF₃)₄{μ-Ph ₂P(CH₂)_nPPh₂} ₂(μ-bipyen)₂] when n = 1 or 5, but as a one-dimensional polymer [{Ag₂(O₂CCF₃)₂{μ- Ph₂P(CH₂)_nPPh₂}( μ-bipyen)}_x] when n = 6. The complex [{Ag{μ-Ph₂P(CH₂)₃PPh₂ }(μ-bipyen)}_x](CF₃CO ₂)_x has a novel network structure.