作者: Liang Zhao , Thomas C. W. Mak
DOI: 10.1021/OM700370P
关键词:
摘要: Silver−thiophene π interactions in two bonding modes, namely, η2-(CC) and κ-(C,S), have been observed for the first time crystalline silver(I) complexes (C4H3S-2)C⋮CAg·4AgCF3CO2 (1), 2[(C4H3S-2)C⋮CAg]·8AgCF3CO2·CH3CN (2), (C4H3S-3)C⋮CAg·4AgCF3CO2 (4), bearing thiophene ligands with an ethynide substituent at 2- or 3-position. Introduction of additional betaine component 3[(C4H3S-2)C⋮CAg]·8AgCF3CO2·Me3N+CH2CO2-·4.5H2O (3) replacement trifluoroacetate by pentafluoropropionate (C4H3S-3)C⋮CAg·5AgC2F5CO2·4H2O (5) were found to interrupt these silver−thiophene instead form infinite π−π-stacked silver chain a π−π-stacking-stabilized Ag8 aggregate, respectively. The establishment new kind silver−ethynide supramolecular synthon, R−C⋮C⊃Agn (R = 2-, 3-thienyl; n 4), highlights potential building metal−organic frameworks utilizing π-coordination capacity heterocyclic ring.