Three Cd(II) coordination polymers (CPs), {[Cd(TCPA)(L)]·H 2 O} n ( 1 ), {[Cd(1,2-BDC)(L)]·H 2 O} n ( 2 ) and [Cd(1,3-BDC)(L) 0.5 (H 2 O)] n ( 3 ) (L = 1,3-bis(5,6-dimethylbenzimidazol-1-yl)propane, H 2 TCPA = 2,3,5,6-tetrachloroterephthalic acid, 1,2-H 2 BDC = 1,2-benzenedicarboxylate and...