Ligand displacement for fixing manganese : relevance to cellular metal iontransport and synthesis of polymeric coordination complexes
Ligand displacement for fixing manganese : relevance to cellular metal iontransport and synthesis of polymeric coordination complexes
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固定锰的配体置换：与细胞金属离子传输和聚合物配位络合物合成的相关性
DOI：
10.1039/c2dt32547k
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发表时间：
2013
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et al.
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作者：
N. M. Sanchez-Ballester;et al.
一种N-甲基-N，N-二甲基-N，（羧甲基）-N-[3，5-双（α，α-二甲基苄基-2-羟基苄基）]甘氨酸（HDA）配体（L）通过双核配合物{[Mn 2（L）2（OH）（OCH 3）][Mn（H 2 O）3（CH 3 OH）3]，2，三斜晶系P，a = 13.172（3），B = 15.897（3），c = 19.059（4），V = 3461.9（13），B = 21.3505（8），c = 26.7827（17），V = 6722.7（7）~（3）}，其中两个羧基通过双羧基配位的Mn ~（2+）离子环化。该反应是讨论其意义作为一个例子，锰离子可能会被隔离在生物系统。一个类似的溶剂化配体置换反应被用来合成的HDA铁（III）络合物的配位聚合物，涉及通过桥接羧基聚合。用不同的配位醇可以制备几种同构聚合物（5-7;对于5：正交晶系Pbca，a = 9.411（5）<$，B = 16.390（8）<$，c = 37.968（19）<$，V = 5856（5）<$3），表明该方法具有潜在的合成用途。
A dinuclear manganese(III) complex (1) of an N-(carboxymethyl)-N-[3,5-bis(α,α-dimethylbenzyl-2-hydroxybenzyl)]glycine (HDA) ligand (L) binds a manganese(II) species through displacement of its solvating ligands by appropriately dispositioned carbonyl groups of a dinuclear complex {[Mn2(L)2(OH)(OCH3)][Mn(H2O)3(CH3OH)3], 2, triclinic P, a = 13.172(3) Å, b = 15.897(3) Å, c = 19.059(4) Å, V = 3461.9(13) Å3} leading to a trinuclear complex {3, monoclinic P21/n, a = 11.7606(8) Å, b = 21.3505(8) Å, c = 26.7827(17) Å, V = 6722.7(7) Å3} with cyclization of two of the carboxy groups through the doubly-carboxy group coordinated Mn2+ ion. The reaction is discussed in terms of its significance as an illustration of how Mn2+ ions might be sequestered in biological systems. A similar solvato-ligand displacement reaction was used to synthesise coordination polymers of an HDA iron(III) complex involving polymerization through a bridging carboxylato group. Several isostructural polymers (5–7; for 5: orthorhombic Pbca, a = 9.411(5) Å, b = 16.390(8) Å, c = 37.968(19) Å, V = 5856(5) Å3) with different coordinated alcohols could be prepared indicating the potential synthetic uses of this method.