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A novel one-dimensional zigzag chain-like Co coordination polymer constructed from 4,4'-bi-pyridine (4,4'-bpy) and 2-hy-droxy-benzoate (2-OHbenz) ligands, namely, -poly[[(4,4'-bi-pyridine-κ)-(μ-2-hy-droxy-benzoato-κ :')(2-hy-droxy-benzoato-κ ,')cobalt(II)]-μ-4,4'-bi-pyridine-κ :'-[aquahemi(μ-4,4'-bi-pyridine-κ :')(2-hy-droxy-benzoato-κ(2-hy-droxy-benzoato-κ :')cobalt(II)], [Co(CHO)(CHN)(HO)] , has been synthesized by reacting cobalt(II) nitrate trihydrate, 4,4'-bpy and 2-hy-droxy-benzoic acid in a mixture of water and methanol at room temperature. There are two independent Co centers, Co1 and Co2, in the asymmetric unit, revealing a distorted octa-hedral geometry with chromophore types of [CoNO] and [CoNOO'], respectively. The Co1 ions are doubly bridged by 2-OHbenz ligands with - coordination mode, generating a dinuclear unit. The bridging 4,4'-bpy ligands connect these dinuclear units and the mononuclear Co2 chromophores, providing a one-dimensional alternating zigzag chain-like structure. In the crystal, inter-molecular hydrogen bonds, C-H⋯π and π-π stacking inter-actions are observed and these help to consolidate the packing. In addition, the physical properties of the title compound are reported.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7405572 | PMC |
| http://dx.doi.org/10.1107/S2056989020009482 | DOI Listing |
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