Ferromagnetic behavior of nickel(II)-imino nitroxide derivatives

Nickel(II) hexafluoroacetylacetonate derivatives of imino nitroxides have been synthesized and structurally characterized. In complex 1, diaquobis(2-phenyl-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl)bis(hexafluoroacetylacetonato)nickel(II), Ni(hfac) 2 (H 2 O) 2 (IMPh) 2 , the phenyl-substituted free radical is not coordinated to the metal but hydrogen bonded to the aquo metal fragment