Vogel C, Heinemann FW, Khusniyarov M, Meyer K (2010)
Publication Type: Journal article, Original article
Publication year: 2010
Original Authors: Vogel C.S., Heinemann F.W., Khusniyarov M.M., Meyer K.
Publisher: Elsevier
Book Volume: 364
Pages Range: 226-237
Journal Issue: 1
DOI: 10.1016/j.ica.2010.07.039
The chelating ligand tris-[2-(3-aryl-imidazol-2-ylidene)ethyl]amine (TIMEN, R = aryl = 2,6-xylyl (xyl), mesityl (mes)) has provided access to reactive transition metal complexes. Here, two new tripodal N-heterocyclic carbene ligands of the TIMEN system (R = aryl = tolyl (tol), 3,5-xylyl (3,5xyl)), featuring sterically less demanding aryl substituents were synthesized. With these ligands, Fe(II) precursor complexes could be obtained, namely [(TIMEN)Fe](BF) (3) and [(TIMEN)Fe(CHCN)](PF) (7), which showed unexpected reactivity upon reduction. Treatment of the compounds with sodium amalgam yield the tris- and bis-metallated products, [(TIMEN)Fe] (4) and [(TIMEN)Fe] (8), respectively. While the Fe(III) complex 4 is relatively inert towards oxygen, the Fe(II) complex 8 is prone to oxidation. This oxidation of 8 can readily be observed in chlorinated solvents, producing the Fe(III) complex [(TIMEN )Fe](PF) (9). All new ligand imidazolium precursors and metal complexes were characterized by single crystal X-ray structure determination. © 2010 Elsevier B.V. All rights reserved.
APA:
Vogel, C., Heinemann, F.W., Khusniyarov, M., & Meyer, K. (2010). Unexpected reactivity resulting from modifications of the ligand periphery: Synthesis, structure, and spectroscopic properties of iron complexes of new tripodal N-heterocyclic carbene (NHC) ligands. Inorganica Chimica Acta, 364(1), 226-237. https://dx.doi.org/10.1016/j.ica.2010.07.039
MLA:
Vogel, Carola, et al. "Unexpected reactivity resulting from modifications of the ligand periphery: Synthesis, structure, and spectroscopic properties of iron complexes of new tripodal N-heterocyclic carbene (NHC) ligands." Inorganica Chimica Acta 364.1 (2010): 226-237.
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