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Ferromagnetic exchange coupling in phosphonato-bridged dinuclear copper (II) compound with monoethyl (pyridyn-2-ylmethyl)phosphonate ligand (2-mpmpe): Cu2(2-mpmpe)2(H2O)2(NO3)2.
Autorzy
Rok wydania
2008
Czasopismo
Numer woluminu
27
Strony
1721-1728
DOI
10.1016/j.poly.2008.02.003
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The interaction of diethyl (pyridyn-2-ylmethyl)phosphonate (2-pmpe) with Cu(NO3)2 · 6H2O leads to a partial hydrolysis of the starting ligand and formation of the compound of the formula Cu2(2-mpmpe)2(H2O)2(NO3)2, where 2-mpmpe = monoethyl (pyridyn-2-ylmethyl)phosphonate. The crystal and molecular structure of a copper(II) compound was determined by single X-ray diffraction method. Its structure consists of five-coordinated in distorted square planar geometry (CuNO4 chromophore) copper(II) ions doubly bridged by OPO from phosphonate. The Cu⋯Cu distance is 4.69 Å. The crystal packing is determined by the interdinuclear hydrogen bond system, which leads to a three-dimensional (3D) H-bonds network. The compound was characterized by infrared, ligand field, EPR spectroscopy, and magnetic studies. The magnetic properties of the title compound investigated over the 1.8–300 K, revealed the occurrence of a weak ferromagnetic coupling through phosphonate bridge (J = 1.86 cm−1) and interdimer superexchange coupling through H-bond network (zJ′ = −0.17 cm−1). Spectroscopic and magnetic properties are presented in the light of crystal structure.
Słowa kluczowe
Copper(II) compound, Phosphonato-bridge, Crystal structure, Spectroscopy, Magnetism
Adres publiczny
https://doi.org/10.1016/j.poly.2008.02.003
Strona internetowa wydawcy
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