Metal‐Dependent Topologies and Water Aggregations in Copper and Nickel Carboxycinnamate Coordination Polymers with a Long‐Spanning Dipyridylamide Ligand

Abstract

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 }