An unnatural amino acid bearing bipyridyl backbone:: Selective formation of mer-isomers for iron(II) tris-chelate complexes
An unnatural amino acid bearing bipyridyl backbone:: Selective formation of mer-isomers for iron(II) tris-chelate complexes
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DOI：
10.1246/cl.2005.1554
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发表时间：
2005-11-05
影响因子：
1.6
通讯作者：
Ishida, H
中科院分区：
文献类型：
--
作者：
Kyakuno, M;Oishi, S;Ishida, H
研究了5 ′-N-乙酰氨基-2，2 ′-联吡啶-5-羧酸衍生物与铁（Ⅱ）配合物的面/面比。结果发现，酰胺衍生物与仲胺选择性地产生的mer异构体的配体结构无关。另一方面，对于与伯胺的酰胺，fac-和mer-复合物的比例增加和减少，分别与取代基的大小的增加，表明稳定的表面异构体之间的静电相互作用（或氢键）的配体。
The fac/mer-ratios of the iron(II) complexes with the derivatives of an unnatural amino acid, 5'-N-acetylamino-2,2'-bipyridine-5-carboxylic acid, were investigated. It was found that the amide derivatives with secondary amines selectively yielded the mer-isomers independently of the ligand structures. On the other hand, for the amides with primary amines, the ratios of the fac- and mer-complexes increased and decreased, respectively, with the increasing sizes of the substituents, suggesting stabilization of the fac-isomers by electrostatic interaction (or hydrogen bondings) between the ligands.