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Hydrothermal reactions of 3-cyanopyridine and Na N3 with Zn Cl_2 or Cd Cl_2·5/2H_2 O in the presence of 1,4-benzenedicarboxylic acid(H2bdc) yielded two new coordination polymers,{[Zn(3-ptz)(bdc)_(0.5)(H_2O)_2]n·2H_2O}_n(1) and [Cd_2(3-ptz)_2Cl_2