The preparation of the α-iodo-substituted tripods within the series of tris(2-pyridylmethyl)amine ligands, and the characterization of the corresponding I_1–3TPAFeCl₂ complexes

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• 作者：Hassen Jaafar^a ; Ré ; my Louis^a ; Dominique Mandon ; ^a ; ^{mandon@chimie.u-strasbg.fr}
• 关键词：Halogen-substituted tris(2-pyridylmethyl)amine ligands ; Iron complexes ; Tripodal tetraamines
• 刊名：Inorganica Chimica Acta
• 出版年：2011
• 出版时间：30 January 2011
• 年：2011
• 卷：366
• 期：1
• 页码：147-153
• 全文大小：495 K

文摘

We report in this communication the easy preparation of the α-iodo substituted tripods within the series of tris(2-pyridylmethyl)amine ligands, I₁TPA, I₂TPA and I₃TPA, respectively. The characterization of the corresponding FeCl₂ complexes in solution is described and structural analysis by X-ray diffraction for I₁TPAFeCl₂ and I₂TPAFeCl₂ is also reported. The steric effect of the iodo substituent is evidenced: (i) by elongation of the metal to iodo-pyridine distance within I₁TPAFeCl₂, which however remains a very stable compound; (ii) by decoordination of one substituted pyridine in I₂TPAFeCl₂ and I₃TPAFeCl₃. In I₂TPAFeCl₂ and in the solid state, this uncoordinated pyridine strongly interacts with the same fragment of the neighbouring molecule, providing an overall dinuclear arrangement for this complex.