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A one‐dimensional coordination polymer based on a di‐Schiff base supported trinuclear CuII subunit

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A novel one‐dimensional CuII coordination polymer, catena‐poly[bis(μ4‐3‐{[2‐(3‐hydroxy‐2‐oxidobenzylidene)hydrazinylidene]methyl}benzene‐1,2‐diolato)dimethanoltricopper(II)], [Cu3(C14H10N2O4)2(CH3OH)2] n , (I), was constructed with a di‐Schiff base supported centrosymmetric trinuclear CuII subunit. In the subunit, two peripheral symmetry‐related CuII cations have square‐pyramidal CuNO4 geometry and the central third CuII cation lies on an inversion centre with octahedral CuN2O4 geometry. In (I), each partially deprotonated di‐Schiff base 3‐{[2‐(3‐hydroxy‐2‐oxidobenzylidene)hydrazinylidene]methyl}benzene‐1,2‐diolate ligand (Hbcaz3−) acts as a heptadentate ligand to bind the CuII centres into chains along the a axis. A centrosymmetric Cu2O2 unit containing an asymmetrically bridging O atom, being axial at one Cu atom and equatorial at the other Cu atom, links the trinuclear CuII subunit into a one‐dimensional chain, which is reinforced by intramolecular phenol–methanol O—H...O and methanol–phenolate O—H...O hydrogen bonds. Interchain π–π stacking interactions between pyrocatechol units, with a distance of 3.5251 (18) Å, contribute to the stability of the crystal packing.
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Document Type: Research Article

Affiliations: Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, People's Republic of China

Publication date: April 15, 2012

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