Studies on bis(3,5-di-t-butyl-1,2-benzoquinone 1-oximato)manganese(II) and its mixed-ligand complexes.

摘要: The synthesis, spectroscopy, and redox-reactivity towards PPh(3) of bis(3,5-di-t-butyl-1,2-benzoquinone 1-oximato)manganese(II), Mn(ox)(2), its mixed-ligand complexes, Mn(ox)L(x) [L(x)=8-hydroxyquinolinato (L(1)), 2,2'-bipyridine (bpy) (L(2)), 1,10-Phenanthroline (phen) (L(3)) N-(2-hydroxyphenyl)-3,5-di-t-butylsalicylaldiminato (L(4))] are presented. While some complexes exhibit solid-state ESR spectra they were ESR-silent in toluene or CHCl(3) at 300 K. reduction all with an excess PPh(3), independently from the nature secondary L(x) ligands, results appearance a six-line hyperfine coupling 55Mn (I=5/2) (A(Mn)=95-100 G) seven-line radical signal, which was assigned to phosphiniminophenoxyl type radicals (g=2.0056-2.0075, A(P)=8. 5 G A(N)=1.875 G).