Abstract. Hydrothermal reactions of nickel or cobalt nitrate with the dipyridylamide ligand bis(4-pyridylformyl)piperazine (4-bpfp) and either 5-methoxyisophthalate (H 2 omeip) or 5-methylisophthalate (H 2 mip) afforded a series of coordination polymers that were structurally characterized by single-crystal X-ray diffraction. Different synthetic conditions afforded the 1D chain phase {[Ni(Homeip) 2 (H 2 omeip)(bpfp)]·2H 2 O} n (1) or the mutually inclined interpenetrated (4,4) grid system in {[Ni(omeip)(bpfp)(H 2 O)]·2H 2 O} n (2). The analogous cobalt phase {[Co(omeip)(bpfp)]·3H 2 O} n (3) lacks bound water
Abstract. Hydrothermal reaction of the requisite metal nitrate, carboxycinnamic acid (H 2 cca), and the long-spanning dipyridylamide bis(4-pyridylformyl)piperazine (4-bpfp) generate crystalline coordination polymers whose topology depends critically on the metal coordination geometric preference. These two new phases were structurally characterized by single-crystal X-ray diffraction. {[Cu(cca)(4-bpfp)]·2.5H 2 O} n (1) manifests a non-interpenetrated 6-connected pcu net based on chain motifs featuring carboxylate-bridged {Cu 2 (OCO) 2 }
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