Synthesis and Crystal Structures of Two Metal–Radical Complexes

Abstract

Two new M(II)–radical complexes [M(hfac)2(NITPhSCH3)2] (M\u2009=\u2009Co (1), Mn (2); NITPhSCH3\u2009=\u20094′-thiomethylphenyl-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide; and hfac\u2009=\u2009hexafluoroacetylacetonate) have been synthesized and characterized by X-ray diffraction analysis, element analyses, IR and UV–Visible spectroscopy. X-ray analysis reveals that the structures of both complexes are similar and crystallize in the Triclinic space group in P1 with the respective cell parameters: a\u2009=\u200910.9014(12) Å, b\u2009=\u200911.5065(13)\xa0Å, c\u2009=\u200920.084(2) Å, α\u2009=\u200981.379(3)°, β\u2009=\u200984.015(3) °, γ\u2009=\u200963.906(3)°, V\u2009=\u20092234.8(4) Å3, Z\u2009=\u20092 for compound 1 and a\u2009=\u200910.9449(13) Å, b\u2009=\u200911.5604(13) Å, c\u2009=\u200920.224(2) Å, α\u2009=\u200981.337(3) °, β\u2009=\u200984.016(3) °, γ\u2009=\u200963.964(3)°, V\u2009=\u20092270.9(5) Å3, Z\u2009=\u20092 for compound 2. The central M(II) ions are coordinated by four oxygen atoms from two hfac and two oxygen atoms from nitronyl radicals to form a distorted octahedron. Additionally, the optical properties of the two complexes are reported.Graphic Abstract