Synthesis, structural and magnetic characterization of a new copper(II)-nitronyl nitroxide radical complex

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.

Bibliographic Details

Main Authors:	Marguerite,Kalisz, Novak,Miguel A., Pinheiro,Carlos B., Florencio,Antonio S., Chapuis,Gervais, Caneschi,Andrea, Vaz,Maria G. F.
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Química 2007
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000500007
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