Reactions of the aromatase inhibitor letrozole derivative 4,4Ј-(1H-1,2,4-triazol-1-yl)methylene-bis(benzonic acid) (H 2 tzmb) with Zn II , Cd II , or Pb II salts under similar conditions resulted in the generation of three coordination polymers, namely, {[Zn(tzmb) (H 2 tzmb)]•H 2 O} n (1), [Cd(tzmb)(H 2 O) 2 ] n (2), and {[Pb(tzmb) (H 2 O)]•DMF} n (3), respectively. Their structures were determined by single-crystal X-ray diffraction analyses and further characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction, and thermogravimetric analyses. Complex 1 features a twofold 2D Ǟ 2D