Polynuclear copper(II) complexes bridged by polycarboxylates of aromatic and N-heterocyclic compounds

Salah S. Massoud, Febee R. Louka, Mohammed A. Gazzaz, Maher M. Henary, Roland C. Fischer, Franz A. Mautner

Research output: Contribution to journalArticle

Abstract

Two categories of polynuclear Cu(II) complexes bridged by multicarboxylate compds. 2,5-pyridine dicarboxylic acid (H2Py2,5-dc), 2,4-pyridine dicarboxylic acid (H2Py2,4-dc), 2,3-pyrazine dicarboxylic acid (H2Pyaz2,3-dc) and terephthalic acid (H2tp) have been isolated with the tripod N4-donor ligands tris(2-pyridylmethyl)amine (TPA) and tris(2-isopropyl-2-aminoethyl)amine (iptren). The trinuclear bridged-carboxylato species were obtained with TPA: [(TPA)Cu-(μ2-Py2,4-dc)2Cu(H2O)2-Cu(TPA)](ClO4)2·2H2O (1), [Cu(TPA)-Cu(μ2-Py2,5dc)2-Cu(TPA)](ClO4)2 (2) and [(TPA)Cu-(μ2-Pyaz2,3-dc)2Cu(ClO4)2-Cu(TPA)][Cu(TPA)(H2O)]2(ClO4)4·4H2O (3), and the dinuclear species [Cu2(iptren)2(tp)](ClO4)2 (4) and [Cu2(iptren)2(Pyaz2,5-dc)](ClO4)2·H2O (5) with iptren. The synthesized complexes were characterized by elemental microanalyses, cond. measurements, IR and UV-visible spectroscopic techniques as well as by single crystal x-ray crystallog. The nature of polycarboxylate compds. used and the coligands skeletal structure play crucial role in adopting certain carboxylate-bonding mode and the nuclearity of the coordination product. [on SciFinder(R)]
Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalPolyhedron
Volume111
DOIs
Publication statusPublished - 2016

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