Handcuff-like metallo-pseudorotaxanes consisting of tiara[5]arene wheels and dimeric silver trifluoroacetate axles

Abstract

The complexation between tiara[5]arene (T[5]) and silver trifluoroacetate affords a binuclear metallo-pseudorotaxane on account of multiple endo-cavity Ag^I η²-arene interactions. Furthermore, two such enantiomeric [(CF₃CO₂Ag)₂⊂T[5]] complexes are bridged by an extra (CF₃CO₂Ag)₂ dimer through exo-wall Ag^I η²-arene coordination, resulting in a unique handcuff metallo-bis-pseudorotaxane structure in the solid state.