SUPRAMOLECULAR STRUCTURE, IR SPECTROSCOPIC AND MAGNETIC STUDIES OF A NOVEL COPPER (II) COMPLEX ([Cu(phen)]2(H2PO4)2HPO4)2(H3PO4)4
M. Ben Nasr1, E. Aubert1, V. Ferretti2, E. Espinosa1, P.S.P. Silva3, L.C.J. Pereira4, M.R. Silva3
1Vandoeuvre les Nancy, Nancy, France
mahjouba_bennasr@yahoo.fr
2Center for Structural Diffractometry, Ferrara, Italy
3University of Coimbra, Coimbra, Portugal
4Instituto Superior Tecnico, UTL, Bobadela LRS, Portugal
Ключевые слова: coordination compounds, copper(II) complex, crystal structure, magnetism, IR spectroscopy, cryomagnetic
Страницы: 1616-1623
Аннотация
A new Cu (II) complex with bidentate o-phenanthroline (phen) ligand, ([Cu(phen)]2(H2PO4)2××HPO4)2(H3PO4)4, has been synthesized and characterized by single crystal X-ray diffraction, IR spectroscopy and magnetic data. The crystal structural analysis shows that the title compound contains two phosphate-bridged dimeric units ([Cu(phen)]2(H2PO4)HPO4), which are crystallographically independent. In these units, each copper atom is five coordinated and the geometry around the Cu(II) can be described as slightly distorted square-based pyramidal, with parameter varying between 0.001 and 0.04. The crystal structure is stabilized by O-H…O and C-H…O hydrogen bonds between the dimeric units and the phosphoric acid molecules. In addition, the organic ligands are associated by π-π stacking interactions between neighboring non-nitrogen aromatic rings. The infrared spectrum recorded at room temperature was interpreted on the basis of data published in the literature. The magnetic susceptibilities data show a weak intra-dimer ferromagnetic interaction with J = 31.8 K.
DOI: 10.15372/JSC20150815 |
