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Three dinuclear copper(II) macrocyclic complexes, formulated as [Cu 2 L(N 3 ) 2 (0.5H 2 O) 2 ] n ( 1 ), [Cu 2 L(ClO 4 ) 2 (CH 3 CH 2 OH)] ( 2 ) and [Cu 2 L(CH 3 OH) 2 ](ClO 4 ) 2 ( 3 ) (LH 2 = [2+2] Schiff base macrocyclic ligand condensed from 4-chloro-2,6-diformylphenol and 1,3-diaminopropane), have been prepared and determined by X-ray single-crystal diffraction. Complex 1 shows two six-coordinate Cu(II) centers in which two monodentate N 3 - anions and two half-water molecules are bonded at the apical positions in the trans configuration. Furthermore, the dimeric half-water molecules serve as a μ 2 -bridge linking adjacent macrocyclic units together with the multiple O H…N hydrogen bonds with azide anions, forming a novel 1D chain-like coordination polymer. Complexes 2 and 3 are obtained from different solvents (ethanol and methanol) and they can be converted into each other. The molecular structures and packing mode of 2 and 3 are different where six-coordinate and five-coordinate copper(II) centers are present, respectively. |
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