Synthesis, crystal structures, and magnetic properties of two Cu (II)-complexes based on <i>in situ</i> generated 5-NO<sub>2</sub>-2-hydroxyisophthalic acid

<div><p>Two Cu(II)-complexes, {[Cu<sub>2</sub>(O<sub>2</sub>N-ipO)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>]·(H<sub>2</sub>dpa)}<sub>n</sub> (<b>1</b>) and [Cu<sub>3</sub>(O<sub>2</sub>N-ipO)<sub>2</sub>(btb)]<sub>n</sub> (<b>2</b>) (O<sub>2</sub>N-ipO = deprotonated 5-NO<sub>2</sub>-2-hydroxylisophthalic acid, H<sub>2</sub>dpa = protonated dipyridin-4-ylamine and btb = 1,3-bis(1,2,4-triazol-l-yl)butane), were synthesized from an <i>in situ</i> generated 5-NO<sub>2</sub>-2-hydroxylisophthalic acid and characterized by elemental analysis, FT-IR, single-crystal X-ray diffraction, PXRD, and TGA techniques. Complex <b>1</b> exhibits a 3-D alternate supramolecular network extended by the binuclear [Cu<sub>2</sub>(O<sub>2</sub>N-ipO)<sub>2</sub>]<sup>2−</sup> unit via intermolecular hydrogen bond interactions. Complex <b>2</b> features a 3-D pillar-layered network with a (4<sup>4 </sup>× 6<sup>10 </sup>× 8) (4<sup>4 </sup>× 6<sup>2</sup>)-<b>fsc</b> topology. Solid-state properties such as thermal stabilities and magnetic properties of the complexes were also investigated.</p></div>

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