One-dimensional structures of nickel(II) and cobalt(II) coordination complexes {[ML2(H2O)2]·L·H2O·(ClO4)2} (M=Co or Ni; L=1,3-bis(4-pyridyl)propane)

Treatment of 1,3-bis(4-pyridyl)propane with Co(II)(ClO4)2 or Ni(II)(ClO4)2 gives isostructural one-dimensional coordination polymers. The metal ions have an octahedral geometry and are bridged by two crystallographically independent ligands along each chain. Alongside each coordination chain an array of non-coordinated ligands are hydrogen bonded at each end to the ligated water molecules.