Anion-directed assembly of metal–organic coordination complexes from 1,3-imidazolidine-2-thione ligand and silver salts

Five novel silver (Ι) complexes with 1,3-imidazolidine-2-thione ligand formulated as [Ag2(η1-SC3H6N2)6]SO4 (1), [Ag2(μ2-SC3H6N2)2(η1-SC3H6N2)4](NO3)2 (2), [Ag(μ2-SC3H6N2)Br]n (3), [Ag2(μ2-SC3H6N2)3(CH3COO)2]n (4), [Ag(μ2-SC3H6N2)Cl]n (5) have been synthesized under similar conditions except for different anions and solvents. They are structurally characterized by elemental analysis, IR, TG and single crystal X-ray diffraction. Complex 1 is a binuclear complex, with SO42− anions as the counteranions. Complex 2 is a molecular binuclear silver cluster, with NO3− anions as the counteranions. Complex 3 shows a novel 2D lamella structure constructed by the S atom of 1,3-imidazolidine-2-thione ligand and Br− anions, and exhibits 12-membered metallacyclic rings in its structure. Complex 4 is a novel 2D layered polymer with a graphite-like array of silver (I) ions, with CH3COO− anion coordinated to silver(I) ions by O atom. Complex 5 shows a 3D diamond-like network structure constructed by the sulfur atom of 1,3-imidazolidine-2-thione ligand and Cl− anions.