Syntheses and structures of Ag(I) complexes containing 1,4-bis(4,5-dihydro-2-oxazolyl)benzene

Abstract

The reactions of the polydentate ligand 1,4-bis(4,5-dihydro-2-oxazolyl)benzene ( L) with AgX (X = CH 3COO −, ClO 4 − and CF 3SO 3 −) afforded the complexes [Ag 2( L)(CH 3COO) 2] ∞ ( 1), [Ag 2( L) 3(ClO 4) 2] ∞ ( 2), and [Ag( L)(CF 3SO 3)] ∞ ( 3), whereas the reaction of L with Ag 2SO 4 in MeOH/H 2O system afforded {[Ag 2( L) 3(H 2O) 3][SO 4] · 9H 2O} ∞ ( 4). The EA and IR have been recorded and all the complexes have been structurally characterized by X-ray crystallography, confirming that complexes 1– 4 are two-dimensional coordination polymeric frameworks. The bidentate L ligands in complexes 3 and 4 adopt both the syn and anti conformation and those in 1 and 2 adopt the anti conformation only. The anions CH 3CO 2 − in complex 1 bridge the Ag(I) atoms in η 1, η 2, μ 3-coordination mode forming a 1-D zig-zag –[Ag(CH 3COO)] n – chains, while the anions ClO 4 −, CF 3SO 3 − and SO 4 2− in complexes 2– 4 are not coordinated to the Ag(I) atoms, but all of them play an important roles in linking cationic 2-D frameworks into 3-D supramolecular structures.