Two threefold interpenetrated two‐dimensional frameworks based on a flexible imidazole‐containing ligand and benzene‐1,4‐dicarboxylate |
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Authors: | Ning‐Ning Yuan Qi‐Kui Liu Jian‐Ping Ma Ru‐Qi Huang Yu‐Bin Dong |
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Abstract: | The open‐chain polyether‐bridged flexible ligand 1,2‐bis2‐(1H‐1,3‐imidazol‐1‐ylmethyl)phenoxy]ethane (L) has been used to create two two‐dimensional coordination polymers under hydrothermal reaction of L with CdII or CoII, in the presence of benzene‐1,4‐dicarboxylic acid (H2bdc). In poly(μ2‐benzene‐1,4‐dicarboxylato){μ‐1,2‐bis2‐(1H‐1,3‐imidazol‐1‐ylmethyl)phenoxy]ethane}cadmium(II)] dihydrate], {Cd(C8H4O4)(C22H22N4O2)]·2H2O}n, (I), and the cobalt(II) analogue {Co(C8H4O4)(C22H22N4O2)]·2H2O}n, (II), the CdII and CoII cations are six‐coordinated by four carboxylate O atoms from two different bdc2− dianions in a chelating mode and two N atoms from two distinct L ligands. The metal ions, bdc2− dianions and L ligands each sit across crystallographic twofold axes. The bdc2− coordination mode and the coordinating orientation of the L ligand play an important role in constructing the novel two‐dimensional framework. Complexes (I) and (II) are threefold interpenetrated two‐dimensional frameworks; their structures are almost isomorphous, while the bond lengths, angles and hydrogen bonds are different in (I) and (II). |
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