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Discrimination of Octahedral versus Trigonal Bipyramidal Coordination Geometries of Homogeneous TiIV, VV, and MoVI Amino Triphenolate Complexes through Nitroxyl Radical Units

AutorBadetti, Elena ; Lloveras, Vega ; Romano, Francesco; Lorenzo, Rosalia Di; Veciana, Jaume ; Vidal Gancedo, José ; Zonta, Cristiano; Licini, Giulia
Palabras claveVanadium
Molybdenum
Titanium
Radicals
EPR spectroscopy
Fecha de publicaciónnov-2016
EditorWiley-VCH
CitaciónEuropean Journal of Inorganic Chemistry (31): 4968–4973 (2016)
ResumenA new stable radical-containing ligand and the corresponding VV, TiIV, and MoVI complexes have been synthesized and studied by electron paramagnetic resonance (EPR) spectroscopy. To achieve this goal, a novel strategy for the post-derivatization of a triphenolamine (TPA) ligand has been developed. This has allowed the effective embedding of three TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy) radicals in the corresponding metal complexes. In these systems, dipolar interactions among the organic radicals are strongly dependent on the geometry assumed in solution: a |Δms| = 2 transition is observed when the geometry of the complexes is octahedral, whereas no signal is detected with trigonal bipyramidal geometries.
Versión del editorhttp://dx.doi.org/10.1002/ejic.201600649
URIhttp://hdl.handle.net/10261/148549
DOI10.1002/ejic.201600649
ISSN1434-1948
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