1416326-05-0Relevant articles and documents
Monomeric bis(anilido)iron(II) complexes with N-heterocyclic carbene ligation: Synthesis, characterization, and redox reactivity toward aryl halides
Wang, Xiaojie,Mo, Zhenbo,Xiao, Jie,Deng, Liang
, p. 59 - 65 (2013)
Using monodentate N-heterocyclic carbenes as the ancillary ligands, seven monomeric bis(anilido)iron(II) complexes [(IPr2Me2) 2Fe(NHAr)2] (IPr2Me2 = 2,5-diisopropyl-3,4-dimethylimidazol-1-ylidene; Ar = Ph, C6H 4-2-Pri, Mes, C6H3-2,6-Cl 2, Dipp) and [(IPr)Fe(NHAr)2] (IPr = 2,5-di(2,6- diisopropylphenyl)imidazol-1-ylidene; Ar = C6H3-2,6- Cl2, Dipp) have been prepared by the one-pot reactions of [Fe(Mes)2]2 with the corresponding N-heterocyclic carbenes, and anilines. These high-spin diamido complexes have been fully characterized by 1H NMR, solution magnetic susceptibility, UV-vis, IR, X-ray diffraction, cyclic voltammetry, as well as elemental analysis. The strong affinity of the N-heterocyclic carbene ligands toward ferrous centers, and the steric protection exerted by the NHC ligands are the key factors to stabilize these bis(anilido)iron complexes in a monomeric manner. Reactivity studies revealed the four-coordinate complex [(IPr2Me 2)2Fe(NHMes)2] can react with 1 equiv of 1-iodo-3,5-dimethylbenzene or 1-bromo-3,5-dimethylbenzene in C6D 6 and THF-d8 to furnish 1-C6D 5-3,5-Me2C6H3, and 5-D-1,3-Me 2C6H3, respectively. Under similar conditions, the three-coordinate compound [(IPr)Fe(NHDipp)2] is inert toward these halides.