Journal of the Brazilian Chemical Society | |
Synthesis, structural and magnetic characterization of a new copper(II)-nitronyl nitroxide radical complex | |
Kalisz Marguerite2  Miguel A. Novak1  Carlos B. Pinheiro1  Antonio S. Florencio1  Gervais Chapuis1  Andrea Caneschi1  Maria G. F. Vaz1  | |
[1] ,Universidade Federal do Rio de Janeiro Instituto de Química Rio de Janeiro RJ ,Brazil | |
关键词: molecular magnetism; coordination complexes; nitronyl nitroxide radical; | |
DOI : 10.1590/S0103-50532007000500007 | |
来源: SciELO | |
【 摘 要 】
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[Cu2(bopba)] as a precursor (where NBu4+ is the tetrabutylammonium 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[Cu2(bopba)] (where pEtRad+ stands for the cationic para-2-(4-pyridil)-4,4,5,5-tetramethylimidazoline-1 -oxyl-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.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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