Systematic Investigations of the Nature of the Coupling between a Ln (III) Ion (Ln = Ce (III) to Dy (III) ) and Its Aminoxyl Radical Ligands. Structural and Magnetic Characteristics of a Series of Ln (organic radical) 2 Compounds and the Related Ln (Nitrone) 2 Derivatives J. Am. Chem. Soc. 2000, 122, 3413−3421. | Synapse