PUMA publications for /tag/amido%20radicalWed Jun 15 11:26:56 CEST 2022Angewandte Chemie10869--870Stabilization of Cp(CO)2Mn fragment radicals?971985ESR amido arom;manganese carbonyl cyclopentadienyl manganese radical stabilization The neutral complexes Cp1(CO)2MnL (Cp1 = methylcyclopentadienyl; L = 4-cyanopyridine, p-(NC)2C6H4) and [Cp1(CO)2Mn]2L1 (L1 = 4,4'-bipyridine) were reduced by K to give ligand-centered radical anionic complexes Cp1(CO)2Mn(L-.bul.) (I; L = 4-cyanopyridine) and [Cp1(CO)2Mn]2[L2.bul.-] (II; L2 = p-(NC)2C6H4, 4,4'-bipyridine). The ESR spectra of paramagnetic I and II showed they contained neutral Mn(I) fragments, in which the d6 Mn stabilized the radical anionic ligands by \textgreek{p}-backbonding. In contrast, neutral, paramagnetic Cp1(CO)2MnR (R = NHC6H4NMe2-4, imidazolo, NHR1; R1 = 4-pyridyl) and Cp5(CO)2Mn(NHC6H4Me-4) (Cp5 = pentamethylcyclopentadienyl), prepd. by oxidative deprotonation of Cp1(CO)2Mn(RH) or Cp5(CO)2Mn(NH2C6H4Me-4), contained low spin Mn(II) and diamagnetic ligands. [on SciFinder(R)]Mon Jul 15 13:41:23 CEST 2019Angewandte Chemie10869--870Stabilization of Cp(CO)2Mn fragment radicals?971985ESR amido arom;manganese carbonyl cyclopentadienyl manganese radical stabilization The neutral complexes Cp1(CO)2MnL (Cp1 = methylcyclopentadienyl; L = 4-cyanopyridine, p-(NC)2C6H4) and [Cp1(CO)2Mn]2L1 (L1 = 4,4'-bipyridine) were reduced by K to give ligand-centered radical anionic complexes Cp1(CO)2Mn(L-.bul.) (I; L = 4-cyanopyridine) and [Cp1(CO)2Mn]2[L2.bul.-] (II; L2 = p-(NC)2C6H4, 4,4'-bipyridine). The ESR spectra of paramagnetic I and II showed they contained neutral Mn(I) fragments, in which the d6 Mn stabilized the radical anionic ligands by \textgreek{p}-backbonding. In contrast, neutral, paramagnetic Cp1(CO)2MnR (R = NHC6H4NMe2-4, imidazolo, NHR1; R1 = 4-pyridyl) and Cp5(CO)2Mn(NHC6H4Me-4) (Cp5 = pentamethylcyclopentadienyl), prepd. by oxidative deprotonation of Cp1(CO)2Mn(RH) or Cp5(CO)2Mn(NH2C6H4Me-4), contained low spin Mn(II) and diamagnetic ligands. [on SciFinder(R)]amido radicalCommunity for tag(s) amido radical