Two new Zn(II)-based and Ag(I)-based coordination polymers, [Zn(1,3-pda)(bmib)center dot(H2O)] n [1, H(2)1,3-pda = 1,3-phenylenediacetate, bmib = 1,3-bis(2-methylimidazolyl) butane] and [Ag(bmib)(ClO4)] n (2), have been successfully synthesized and structurally characterized by single crystal X-ray analysis. In addition, in vitro cytotoxicity and anticancer activities of compounds 1 and 2 have been studied against 293 cells (Human Embryonic Kidney cells) and four human lung cancer cell lines (H1299, MSTO-211H, PC9 and A549) by MTT assay.