Poly[[diaquacobalt(II)]-μ-4,4′-bipyridine-κ²N:N′-μ-p-phenylenebis(oxyacetato)-κ²O:O′]

Abstract

The title compound, [CoII(C10H8O6)(C10H8N2)(H2O)2]n, was obtained by the hydrothermal reaction of CoSO(4) with benzene-1,4-dioxydiacetate [systematic name: p-phenylenebis(oxyacetate)] and 4,4'-bipyridine (4,4'-bpy). The Co atom lies at an inversion center and the benzene-1,4-dioxydiacetate and 4,4'-bipyridine moieties lie about other inversion centers. The benzene-1,4-dioxydiacetate ligands bridge the octahedral Co(II) coordination centers, forming a one-dimensional zigzag chain. The chains are further bridged by 4,4'-bpy ligands, forming a novel two-dimensional supramolecular architecture. Hydrogen-bonding interactions between the coordinated water molecules and the carboxylate O atoms lead to the formation of a three-dimensional network structure.

[2-Carboxy-4-(4-carboxy-3-carboxylatobenzoyl)benzoato]bis(1,10-phenanthroline)cobalt(II) monohydrate

“…The Co-N distances range from 2.118 (3) to 2.173 (3) Å , and the Co-O bonds range between 2.093 (2) and 2.351 (3) Å . These distances agree with reported values (Dai et al, 2005). Of the four carboxylate groups, only one is coordinated to the Co atom.…”

Syntheses and Structures of Three New Copper(II) Coordination Polymers Involving 2, 2‐(4, 6‐Dinitro‐1, 3‐phenylenedioxy)­diacetic Acid

“…and metal enzyme models 17–23. On the other hand, solvents can also effect the formation of the crystal structure 24–27. Taking account of the above, our aim was to explore constructing rules and effect of different solvents in the synthesis of copper‐containing complexes.…”

Coordination Polymers of the Heterotopic 1,4‐Phenylene­bis(oxy)diacetic Acid Ligand: Cadmium(II) Complexes

“…Although rigid ligands are generally chosen,7 semiflexible 1,4‐phenylenebis(oxy)diacetic acid (H 2 BDOA), which combines rigidity (benzene ring) and flexibility (pendant arms), is an attractive starting material 8,9. Due to its versatile bonding modes, namely chelating and/or bridging coordination through carboxylato and/or ether groups, the dianion BDOA 2– can form architectures of different sizes and shapes with metal cations, such as a one‐dimensional nickel‐based10 and two‐dimensional cobalt‐11 and manganese‐based12 coordination polymers, copper‐,13 zinc‐14 and cadmium‐based12,15,16 coordination polymers with different structural motifs, several three‐dimensional lanthanide‐based,17,18 and some alkaline earth metal‐based networks 19. In spite of many reports on coordination polymers in the past decade,20 the factors controlling self‐assembly of the frameworks are not yet completely understood 21,22…”