摘要:
Three silver(I) complexes of dibenzo-18-crown-6-ether (DB[18]C6), [Ag(DB[18]C6)(ClO4)](THF) (1), [Ag(DB[18]6)(CF3SO3)](2)-(acetone), (2) and [Ag(DB[IS]C6)(CF3COO)](2)(AgCF3COO)(2) (3) have been synthesized in different solvents and characterized structurally. In each complex, silver ions prefer an octahedral coordination geometry and form close dinuclear complex with DB[18]C6 based on cation-pi interaction in eta(2)-fashion. In particular, the coordination unit involving a bonding at an oxygen group and pi-pi bonding between two benzene rings is quite unique. (C) 2002 Elsevier Science B.V. All rights reserved.