The synthesis and structure of a novel phenylphosphonic diamide bis-TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) diradical (ppdATEMPO) and of four M(hfac)n (hfac = hexafluoroacetylacetonate; M = CuII , NdIII , EuIII or TbIII ;...
Navarro et al. (Thu,) studied this question.