Catena-Poly[[[Diaquanickel(Ii)]-Mu-Pyridine-2,4-Dicarboxylato-[Tetraaqua Nickel(Ii)]-Mu-Pyridine-2,4-Dicarboxylato] Dihydrate]
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS(2007)
摘要
The asymmetric unit of the title coordination polymer, {[Ni-2( C7H3O4N) (2)( H2O) (6)] center dot 2H2O} (n), contains two crystallographically distinct Ni (II) cations, located on inversion centres. One of the Ni ions exists in an octahedral coordination environment formed by two water molecules and two pyridinecarboxylate dianions that serve as N, O- donors. The other Ni ion is coordinated by four water molecules and two monodentate pyridinecarboxylate dianions with an octahedral geometry. The deprotonated pyridine- 2,4- dicarboxylic acid ( pdc 2 (-)) ligand bridges Ni II ions to form the one- dimensional coordination polymer. Extensive hydrogen bonding helps to stabilize the crystal structure.
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