Synthesis and characterization of a Di-μ-oxalato Tetracopper(II) Complex with tetranucleating macrocyclic ligand

Yuji Miyazato, Eiji Asato, Masaaki Ohba, Tohru Wada

Research output: Contribution to journalArticle

Abstract

A tetracopper(II) complex containing two oxalate anions in the metal-based host cavity, [Cu4(Lpy)(μ-ox)2](PF6)2·2(2-PrOH), where ox2-: oxalato (C2O42-), was prepared by reacting H2Lpy, a phenol-based tetranucleating macrocyclic ligand with four pyridylmethyl pendant arms, Cu(ClO4)2·6H2O, and sodium oxalate (1: 4: 2 stoichiometry, respectively) in methanol, followed by exchange of the counteranion with excess of NH4PF6. Single-crystal X-ray diffraction of 1 revealed that two {Cu(II)Cu(II)} units, bridged by a phenolato group of Lpy2-, were connected by two oxalato anions, to construct a rectangular "{CuCu}(μ-ox)2{CuCu}" tetranuclear framework. This rectangular framework was maintained in DMF solution. The magnetic measurement of 1 in the 2-300 K range revealed antiferromagnetic behavior. The antiferromagnetic interaction in this complex occurs between the Cu(II) centers bridged by an oxalate (J= - 140 cm-1).

Original languageEnglish
Pages (from-to)430-436
Number of pages7
JournalBulletin of the Chemical Society of Japan
Volume89
Issue number4
DOIs
Publication statusPublished - Jan 1 2016

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Oxalates
Anions
Ligands
Oxalic Acid
Magnetic variables measurement
Phenol
Stoichiometry
Methanol
Metals
Single crystals
X ray diffraction
perchlorate

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Synthesis and characterization of a Di-μ-oxalato Tetracopper(II) Complex with tetranucleating macrocyclic ligand. / Miyazato, Yuji; Asato, Eiji; Ohba, Masaaki; Wada, Tohru.

In: Bulletin of the Chemical Society of Japan, Vol. 89, No. 4, 01.01.2016, p. 430-436.

Research output: Contribution to journalArticle

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AB - A tetracopper(II) complex containing two oxalate anions in the metal-based host cavity, [Cu4(Lpy)(μ-ox)2](PF6)2·2(2-PrOH), where ox2-: oxalato (C2O42-), was prepared by reacting H2Lpy, a phenol-based tetranucleating macrocyclic ligand with four pyridylmethyl pendant arms, Cu(ClO4)2·6H2O, and sodium oxalate (1: 4: 2 stoichiometry, respectively) in methanol, followed by exchange of the counteranion with excess of NH4PF6. Single-crystal X-ray diffraction of 1 revealed that two {Cu(II)Cu(II)} units, bridged by a phenolato group of Lpy2-, were connected by two oxalato anions, to construct a rectangular "{CuCu}(μ-ox)2{CuCu}" tetranuclear framework. This rectangular framework was maintained in DMF solution. The magnetic measurement of 1 in the 2-300 K range revealed antiferromagnetic behavior. The antiferromagnetic interaction in this complex occurs between the Cu(II) centers bridged by an oxalate (J= - 140 cm-1).

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