Structural Diversity in Oxadiazole-Containing Silver Complexes Dependent on the Anions

摘要

Two coordination polymers, namely [Ag 2 ( L )(SO 3 CF 3 )(H 2 O)](SO 3 CF 3 )?CH 2 Cl 2 ( 1 ) and [Ag 5 ( L ) 4 (H 2 O) 2 ](SbF 6 ) 5 ?5THF ( 2 ), were obtained by reacting oxadiazole-containing tri-armed ligand 1,3,5-tri(2-methylthio-1,3,4-oxadiazole-5yl) benzene ( L ) and silver salts in CH 2 Cl 2 /THF medium. The two complexes crystallized in the tetragonal space group I 4 1 / a and orthorhombic space group Fdd 2, respectively. The Single-crystal X-ray diffraction revealed that the two complexes exhibit strikingly different 3D polymeric structures, which can be ascribed to the different counter anions. L in compound 1 acted as a hexa-dentate ligand, binding to two types of Ag + atoms to form a 3D polymeric structure. L in compound 2 acted as a hexa- and penta-dentate ligand, binding to three types of Ag + atoms to form the 3D polymeric structure. The antibacterial activity of the complexes was also investigated.