Two new iron coordination polymers based on Fe-pyta chains incorporating pyridine-2,4,6-tricarboxylate

Reaction of FeCl2 center dot 6H(2)O, pyridine-2,4,6-tricarboxylic acid(H(3)pyta) and NaOH in the hydrothermal system at 185 degrees C resulted in the formation of 1D coordination polymer[Fe(Hpyta)(H2O)(2)](1) based on Fe-Hpyta chains. When the abpt[abpt=4-amino-3,5-bis(4-pyridyl)-1,2,4-triazole] ligand was employed in the reaction system, a 3D supramolecular porous network (H(2)bpt)[Fe(pyta)(H2O)(2)]center dot-4H(2)O(2) was obtained. The framework was constructed with negative (Fe-pyta)(-) chains and the positive H(2)bpt(+) in situ, formed from the abpt reagent, to form ID channels filled with guest water molecules via hydrogen-bonds. X-Ray diffraction crystal structure analysis shows that complex 1 crystallized in the monoclinic system, space group C2/c, a=1.1490(5) nm, b=0.9008(4) nm, c=1.0058(5) nm, beta= 107.254(9)degrees, V=0.9942(8) nm(3), Z=4; and complex 2 crystallizes in the triclinic system, space group P (1) over bar with a=0.90392(11) nm, b=0.96027(11) nm, c=1.55540(18) nm, alpha=73.558(2)degrees, beta= 86.126(2)degrees, V= 68.745(2)degrees, V=1.2059(2) nm(3) and Z=2.