TY - JOUR
T1 - Synthesis and characterization of a Di-μ-oxalato Tetracopper(II) Complex with tetranucleating macrocyclic ligand
AU - Miyazato, Yuji
AU - Asato, Eiji
AU - Ohba, Masaaki
AU - Wada, Tohru
N1 - Publisher Copyright:
© 2016 The Chemical Society of Japan.
PY - 2016
Y1 - 2016
N2 - 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).
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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U2 - 10.1246/bcsj.20150338
DO - 10.1246/bcsj.20150338
M3 - Article
AN - SCOPUS:84963799209
SN - 0009-2673
VL - 89
SP - 430
EP - 436
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
IS - 4
ER -