A novel two‐dimensional cobalt(II) complex composed of one‐dimensional twisted pair‐like chains: poly[[tetraaquabis(μ3‐pyridine‐2, 5‐dicarboxylato‐κ4N, O2:O5:O5′)dicobalt(II)] dihydrate]. Issue 3 (15th March 2014)

• Record Type: Journal Article
• Authors: Hou, Qing‐Biao; Chen, Li‐Juan; Guo, Jing; Lin, Shen
• Is Part Of: Acta crystallographica. Volume 70:Issue 3(2014:Mar.)
• Page Start: 302
• Page End: 305
• Publication Date: 2014-03-15
• Subjects: Crystallography -- Periodicals; Crystals -- Periodicals; 548.3
• DOI: 10.1107/S2053229614003696
• Languages: English
• ISSNs: 2053-2296

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>A novel neutral polymer, {[Co₂(C₇H₃NO₄)₂(H₂O)₄]·2H₂O}_{<italic>n</italic>}, was hydrothermally synthesized using pyridine‐2, 5‐dicarboxylate (2, 5‐PDC²⁻) as the organic linker. It features a two‐dimensional layer structure constructed from one‐dimensional {[Co(2, 5‐PDC)₂]²⁻}_{<italic>n</italic>} chains interlinked by [Co(H₂O)₄]⁺ units. The two Co^II cations occupy special positions, sitting on inversion centres. Each 2, 5‐PDC²⁻ anion chelates to one Co^II cation <italic>via</italic> the pyridine N atom and an O atom of the adjacent carboxylate group, and links to two other Co^II cations in a bridging mode <italic>via</italic> the O atoms of the other carboxylate group. In this way, the 2, 5‐PDC²⁻ ligand connects three neighbouring Co^II centres to form a two‐dimensional network. The two‐dimensional undulating layers are linked by extensive hydrogen bonds to form a three‐dimensional supramolecular structure, with the uncoordinated solvent molecules occupying the interlamellar region.</p> </abstract>