Strong Silver‐Silver Interactions in Three Silver(I) Carboxylate Complexes with High Cytotoxicity Properties

Three carboxylate silver(I) complexes, [Ag(fbc)]n, (1), [Ag2(cpd)]n (2) and [Ag2(idc)]n (3), were prepared and characterized by X‐ray single crystal analysis, where fbcH is 4‐fluorobenzoic acid, cpdH2 is cyclopentane‐1,1‐dicarboxylic acid and idcH2 is iminodiacetic acid. The three coordination polymers show clear Ag–Ag bonds in their structures. The Ag–Ag bond length 2.850 Å both in 1 and 2 is much shorter than that (2.89 Å) in metal silver, which is the shortest silver–silver interaction reported. The result of cytotoxicity of the three complexes indicates that they have very high crytotoxicity properties to normal cells and carcinoma cells.