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首页> 外文期刊>Crystal growth & design >Flexible disulfoxides as bridging ligands for copper(II) coordination architectures: Fine tuning the complex structures by ligand modifications
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Flexible disulfoxides as bridging ligands for copper(II) coordination architectures: Fine tuning the complex structures by ligand modifications

机译:灵活的二亚砜作为铜(II)配位结构的桥连配体:通过配体修饰微调复杂结构

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摘要

Ten disulfoxide-Cu-II coordination architectures, {[Cu(meso-L-b(1))(2)(ClO4)](ClO4)}(n) (1B), [Cu(meso-L-b(2))(2)(-)(ClO4)(2)](n) (2B), [Cu(rac-L-b(3))(2)(ClO4)(2)](n) (3B), [Cu(meso-L-b(3))(3)](ClO4)(2)}(n) (3B'), [Cu(meso-L-c(1))(2)(ClO4)(2)](n) (1C), [Cu(meso-L-c(2))(2)(ClO4)](2)(ClO4)(2)(CHCl3)(2) (2C), {[Cu(meso-L-c(3))(2)(ClO4)](ClO4)}(n) (3C), [Cu(meso-L-d(1))(2)(ClO4)(2)](n) (1D), {[Cu-2(rac-L-d (2))(4)(ClO4)(2)] (ClO4)(2)(CHCl3)}(n) (2D), and [Cu(rac-L-d(3))(2)(ClO4)(2)](n) (3D), were obtained by the reaction of Cu(ClO4)(2) with nine structurally related flexible disulfoxide ligands, RS(O)(CH2)(n)S(O)R (n = 2-4; R = -CH2CH3, -CH2CH2CH3, -CH2CH2CH2CH3 for L-b(n-1), and L-d(n-1), respectively) in the presence of dehydrating reagent (diethoxyethane) in acetone/chloroform. The X-ray crystal structural analyses of the complexes revealed that all of them display a 2-D network structure, except for 2B and 2C, which display a one-dimensional and a dinuclear cage structure, respectively. All 2-D systems have a (4,4) topological arrangement with different conformations, except for 3B', which has a (3,6) structure. It is noteworthy that complexes 3B and 3B', with different structures, are obtained in the same reaction system, being a relatively rare case. In all of the complexes the ligands react in the bis-monodentate coordination mode, acting as linkage bridges: this feature is important for the assembly of the polymeric complexes. In addition, the configuration inversion of some disulfoxide ligands has been observed when reacting with Cull ions. In combination with other reported disulfoxide-Cu-II complexes, a systematic structural comparison was performed so as to summarize some general relationships among the spacer lengths, terminal groups of related ligands, and structures of the complexes. The magnetic behavior of three complexes, 1B-3B, as examples, was investigated.
机译:十种二亚砜-Cu-II配位结构,{[Cu(meso-Lb(1))(2)(ClO4)](ClO4)}(n)(1B),[Cu(meso-Lb(2))(2 )(-)(ClO4)(2)](n)(2B),[Cu(rac-Lb(3))(2)(ClO4)(2)](n)(3B),[Cu(meso- Lb(3))(3)](ClO4)(2)}(n)(3B'),[Cu(meso-Lc(1))(2)(ClO4)(2)](n)(1C) ,[Cu(meso-Lc(2))(2)(ClO4)](2)(ClO4)(2)(CHCl3)(2)(2C),{[Cu(meso-Lc(3))(2 )(ClO4)](ClO4)}(n)(3C),[Cu(meso-Ld(1))(2)(ClO4)(2)](n)(1D),{[Cu-2(rac -Ld(2))(4)(ClO4)(2)](ClO4)(2)(CHCl3)}(n)(2D)和[Cu(rac-Ld(3))(2)(ClO4) (2)](n)(3D)是通过Cu(ClO4)(2)与九种结构相关的柔性二亚砜配体RS(O)(CH2)(n)S(O)R反应获得的(n = 2-4;在丙酮/氯仿中存在脱水试剂(二乙氧基乙烷)的情况下,Lb(n-1)和Ld(n-1)的R = -CH2CH3,-CH2CH2CH3,-CH2CH2CH2CH3。配合物的X射线晶体结构分析表明,除了2B和2C分别显示一维和双核笼状结构外,所有复合物均显示2-D网络结构。除了具有(3,6)结构的3B'外,所有2-D系统都具有(4,4)具有不同构象的拓扑结构。值得注意的是,在相同的反应系统中获得具有不同结构的配合物3B和3B',这是相对罕见的情况。在所有络合物中,配体均以双单齿配位模式反应,起连接桥的作用:此特征对于聚合物络合物的组装很重要。另外,当与Cull离子反应时,已经观察到一些二亚砜配体的构型反转。结合其他已报道的二亚砜-Cu-II配合物,进行了系统的结构比较,以总结间隔物长度,相关配体的端基和配合物结构之间的一些一般关系。例如,研究了三种配合物1B-3B的磁行为。

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