Synthesis and Characterization of Iron Derivatives Having a Pyridine-Linked Bis(anilide) Pincer Ligand

Abstract

A pyridine-linked bis(aniline) pincer ligand, [2]H_2 ([2]H_2 = (2,6-NC_5H_3(2-(2,4,6-Me_3C_6H_2)-NHC6H4)2), has been synthesized in two steps. Deprotonation with Me_3SiCH_2Li followed by metalation with FeCl_2 yielded a LiCl adduct of [2]Fe. The complex is freed of LiCl with excess TlPF_6 or by crystallization from toluene/petroleum ether, giving [2]Fe(THF). [2]Fe(THF) reacts with I_2 and O_2 to generate [2]FeI and ([2]Fe)_2O, respectively. The complexes have been characterized by ^1H NMR spectroscopy, elemental analysis, X-ray crystallography, and UV−vis spectroscopy. [2]Fe(THF) has been examined using cyclic voltammetry.

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