Self-assembly of one-dimensional coordination polymers from M(II) salts (M = Co, Cd) and flexible ligand 1,3-bis(4-pyridyl)propane

Reaction of CO(NO3)(2) or Cd(NO3)(2) with 1,3-bis(4-pyridyl)propane (or bpp) in a mixture of benzene and methanol generates one-dimensional (1-D) coordination polymers [Co(bpp)(2)(NO3)(2)].2C(6)H(6) (1) and [Cd(bpp)(2)(NO3)(2)].2C(6)H(6) (2). The isostructural 1 and 2 crystallize in monoclinic space group P(1) over bar. The polymeric framework in 1 or 2 is neutral in which the metal ions have an octahedral geometry and are bridged by two bpp ligands. The six-coordination of Co(II) or Cd(II) is satisfied by its binding two nitrate ions in addition to the four pyridyl nitrogen atoms from four different bpp ligands. (C) 2002 Elsevier Science B.V. All rights reserved.