In this work we describe the structure and the magnetic properties of a new copper(II)-NIT complex, where NIT stands for nitronyl nitroxide radical. This was achieved using (NBu4)(4)[Cu-2(bopba)] as a precursor (where NBu4+ is the tetrabutyl ammonium cation and bopba is bis-o-phenylenebis(oxamate)), whose crystal structure was resolved and its magnetics properties studied. From the reaction of this precursor with a cationic nitronyl nitroxide radical, a new compound was prepared and magnetically characterized, namely (pEtRad)(4)[Cu-2(bopba)] (where pEtRad(+) stands for the cationic para-2-(4-pyridil)-4,4,5,5-tetramethylimidazoline-loxyl-3-oxide radical). The magnetic properties suggest that in this six-spin complex there is a competition between short range ferromagnetic and antiferromagnetic interactions. The ferromagnetic interaction can be explained by the orthogonality of the involved magnetic orbitals.
Synthesis, structural and magnetic characterization of a new copper(II)-nitronyl nitroxide radical complex / Kalisz M; Novak MA; Pinheiro CB; Florencio AS; Chapuis G; Caneschi A; Vaz MGF. - In: JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY. - ISSN 0103-5053. - STAMPA. - 18:(2007), pp. 916-923. [10.1590/S0103-50532007000500007]
Synthesis, structural and magnetic characterization of a new copper(II)-nitronyl nitroxide radical complex
CANESCHI, ANDREA;
2007
Abstract
In this work we describe the structure and the magnetic properties of a new copper(II)-NIT complex, where NIT stands for nitronyl nitroxide radical. This was achieved using (NBu4)(4)[Cu-2(bopba)] as a precursor (where NBu4+ is the tetrabutyl ammonium cation and bopba is bis-o-phenylenebis(oxamate)), whose crystal structure was resolved and its magnetics properties studied. From the reaction of this precursor with a cationic nitronyl nitroxide radical, a new compound was prepared and magnetically characterized, namely (pEtRad)(4)[Cu-2(bopba)] (where pEtRad(+) stands for the cationic para-2-(4-pyridil)-4,4,5,5-tetramethylimidazoline-loxyl-3-oxide radical). The magnetic properties suggest that in this six-spin complex there is a competition between short range ferromagnetic and antiferromagnetic interactions. The ferromagnetic interaction can be explained by the orthogonality of the involved magnetic orbitals.File | Dimensione | Formato | |
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