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Two new coordination polymers, [Pb(L)(1,3-bdc)] ·2.5H 2 O (1) and [Cu(L)(1,4-bdc)] (2) (L = 2- (4-fluorophenyl)-1H-imidazo[4,5-f][1,10]phenanthroline; 1,3-bdc, 1,4-bdc = 1,3- and 1,4-benzenedicarboxylate), have been hydrothermally synthesized and characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction. Crystal data for 1: C 54 H 40 F 2 N 8 O 13 Pb 2 , triclinic, space group P¯1, a = 9.3468(19), b = 9.4607(14), c = 15.581(3) Å , α = 90.44(4), β = 101.13(3), γ = 113.97(3)°, V = 1229.6(4) Å 3 , Z = 1. Crystal data for 2: C 27 H 15 CuFN 4 O 4 , triclinic, space group P1¯, a = 9.640(6), b = 10.941(8), c = 11.865(5) Å , α = 62.694(4), β = 69.776(3), γ = 79.915(5)◦, V = 1043.2(11) Å 3 , Z = 2. In 1, the Pb(II) atoms are bridged by the 1,3-bdc ligands to yield a chain structure. The ligands L are only located on one side of the chain, where π · · ·π interactions among neighboring chains result in a supramolecular ladder, and the O-H· · ·O hydrogen bonding interactions further stabilize this structure. Compound 2 shows a layer structure, with stacking by π-π interactions to give a three-dimensional (3D) supramolecular architecture. N-H· · ·O hydrogen bonding further stabilizes the structure of 2.

zeitschrift für naturforschung b

Syntheses, Crystal Structures and Characterization of Two New Pb(II) and Cu(II) Coordination Polymers Based on 2-(4-Fluorophenyl)-1Himidazo[ 4,5-f][1,10]phenanthroline and Benzenedicarboxylate Ligands