Development of bio-inspired chelates with hydrogen bond donors: synthesis and structure of monomeric metal acetate complexes with intramolecular hydrogen bondsBased on the presentation given at Dalton Discussion No. 5, 10?12th April 2003, Noordwijkerhout, The Netherlands.
Development of bio-inspired chelates with hydrogen bond donors: synthesis and structure of monomeric metal acetate complexes with intramolecular hydrogen bondsBased on the presentation given at Dalton Discussion No. 5, 10?12th April 2003, Noordwijkerhout, The Netherlands.
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氢键供体仿生螯合物的开发：具有分子内氢键的单体金属乙酸盐配合物的合成和结构基于 2003 年 4 月 10 日至 12 日道尔顿讨论第 5 期，荷兰诺德韦克豪特的演讲。
DOI：
10.1039/b210794p
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发表时间：
2003
影响因子：
4
通讯作者：
And A. S. Borovik
中科院分区：
文献类型：
--
作者：
M. K. Zart;T. N. Sorrell;D. Powell;And A. S. Borovik
本文报道了新的多齿三脚架化合物双[（N′-叔丁基脲基）-N-乙基]-2-吡啶甲胺（H41）和双[（N′-叔丁基脲基）-N-乙基]-N-甲胺（H42）的合成。这些配体含有两个脲-乙烯臂，当去质子化并与金属离子结合时，将两个氢键供体定位在金属中心附近，使得可以与其他配位物种形成分子内H-键。络合物K[MII（H21）（η1- 0Ac）]和K[MII（H22）（η2- 0Ac）]
（信息产业部）
= Co和Fe）进行了分离和表征。多齿配体介导了乙酸根配位的模式：[MII（H21）（η1-OAc）]−络合物具有单齿配位，而在[MII（H22）（η2-OAc）]−中，乙酸根以双齿方式结合。X-射线衍射研究表明，所有的配合物具有三角双锥配位几何结构的乙酸酯的氧原子是近反式的胺氮供体之一。所有的配合物具有相对较长的M-O键长与其他MII-OAc配合物的特征之前相比。配合物表现出分子内氢键从脲NH基团的乙酸酯的配位氧原子之一，导致MII-OAc键距的延长。在这些乙酸盐配合物中的NH-2 O键长和振动能支持比具有羟基配体的类似配体配合物中的氢键相互作用更弱的氢键。
The synthesis of the new multidentate tripodal compounds bis[(N′-tert-butylureido)-N-ethyl]-2-pyridylmethylamine (H41) and bis[(N′-tert-butylureido)-N-ethyl]-N-methylamine (H42) is described. These ligands contain two urea-ethylene arms that when deprotonated and bound to a metal ion, position two hydrogen bond donors near the metal center so that formation of intramolecular H-bonds with other coordinated species is possible. The complexes K[MII(H21)(η1-OAc)] and K[MII(H22)(η2-OAc)]
(MII
= Co and Fe) have been isolated and characterized. The multidentate ligands mediate the mode of acetate coordination: the [MII(H21)(η1-OAc)]− complexes have a monodentate coordination, whereas in [MII(H22)(η2-OAc)]− the acetate binds in a bidentate manner. X-Ray diffraction studies reveal that all complexes have trigonal bipyramidal coordination geometries with one of the acetate oxygen atoms being nearly trans to the amine nitrogen donor. All the complexes have relatively long M–O bond lengths in comparison with other MII–OAc complexes characterized previously. The complexes exhibit intramolecular H-bonds from the urea NH groups to one of the coordinated oxygen atoms of the acetate, causing a lengthening of the MII–OAc bond distances. The NH⋯O bond lengths and vibrational energies in these acetate complexes support weaker H-bonds than the H-bonding interactions in similar ligand complexes with hydroxo ligands.
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影响因子：
4.6
作者：
Jian-Bing Jiang;S. Koch
通讯作者：
Jian-Bing Jiang;S. Koch
影响因子：
15
作者：
Yeh, CY;Chang, CJ;Nocera, DG
通讯作者：
Nocera, DG
第二领域对铁（III）超氧化物歧化酶中底物类似物结合的贡献。
影响因子：
15
作者：
Xie,Juan;Yikilmaz,Emine;Miller,Anne-Frances;Brunold,ThomasC
通讯作者：
Brunold,ThomasC
多核羧基桥联铁 (II) 簇：合成、结构和主客体化学。
影响因子：
4.6
作者：
Mandal,SK;YoungJr,VG;QueJr,L
通讯作者：
QueJr,L
影响因子：
56.9
作者：
MacBeth, CE;Golombek, AP;Borovik, AS
通讯作者：
Borovik, AS