A new stable radical-containing ligand and the corresponding VV, TiIV, and MoVIcomplexes 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.
|Titolo:||Discrimination of Octahedral versus Trigonal Bipyramidal Coordination Geometries of Homogeneous TiIV, VV, and MoVIAmino Triphenolate Complexes through Nitroxyl Radical Units|
BADETTI, Elena (Corresponding)
|Data di pubblicazione:||2016|
|Appare nelle tipologie:||2.1 Articolo su rivista |
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