New antimony(V) complexes, 1 and 2, containing the redox-active ligands N,N'-bis(3,5-di-tert-butyl-2-hydroxyphenyl)-1,2-phenylenediamine (LH4) and glyoxal-bis(2-hydroxy-3,5-di-tert-butylanil) (L’H2), respectively, were synthesized and characterized. Single-crystal X-ray diffraction analysis determined that complexes 1 and 2...