Abstract
A novel ladder-like polymeric silver(I) complex, [Ag2L2] n •2nH2O, where L is 3-aminopyrazine- 2-carboxylate, was obtained by the reaction of 3-aminopyrazine-2-carboxylic acid and silver oxide in aqueous ammonia. The complex was characterized by elemental analysis, IR spectra and single crystal X-ray determination. The smallest repeat unit contains a [Ag2L2] moiety and two water molecules. The Ag•••Ag distance is 3.176(1) A. Each Ag atom is in a Y-shaped coordination, with one carboxylate O and two pyrazine N atoms from two ligands. In the crystal structure of the complex, the dinuclear silver moieties are linked through 3-aminopyrazine-2-carboxylate ligands, to form 1D ladder-like chain along the b axis. The water molecules are linked to the silver chain through hydrogen bonds. There are π•••π interactions between the chains. The complex showed effective cytotoxic property on human lung cancer cell line A549.
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