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首页> 外文期刊>Crystal growth & design >Cyano-bridged Ln(III)-Fe-III complexes with alterative monosulfoxides as blocking ligands
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Cyano-bridged Ln(III)-Fe-III complexes with alterative monosulfoxides as blocking ligands

机译:氰基桥联的Ln(III)-Fe-III配合物,具有交替的亚砜作为封闭配体

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摘要

The self-assembly reactions of Ln(NO3)(3)center dot aq (Ln = La, Nd, Sm, Gd, Dy, Er, and Yb) with K-3[Fe(CN)(6)] and three monosulfoxide ligands, dimethylsulfoxide (DMSO), diethylsulfoxide (DESO), and tetramethylene sulfoxide (TMSO), respectively, in water give rise to three series of 21 Ln(III)-Fe-III complexes with ten kinds of compositions and structures: cis-[Fe(CN)(4)(mu-CN)(2)La(H2O)(3)(DMSO)(3)](n)center dot nH(2)O (1), [Fe(CN)(5)(mu-CN)Ln(H2O)(3)(DMSO)(4)]center dot H2O [Ln = Nd (2), Dy (5)], [Fe(CN)(5)(mu-CN)Ln(H2O)(4)(DMSO)(3)]center dot H2O [Ln = Sm (3), Gd (4)], trans-[Fe(CN)(4)(mu-CN)(2)Ln(H2O)(DMSO)(4)], [Ln = Er (6), Yb (7)], [Fe(CN)(6)][La(H2O)(6)(DESO)(3)] (8), trans-[Fe(CN)(4)(mu-CN)(2)Ln(H2O)(4)(DESO)(2)](n)center dot 2nH(2)O [Ln = Nd (9), Sm (10), Gd (11), Dy (12), Er (13)], cis-[Fe(CN)(4)(mu-CN)(2)Yb(H2O)(3)(DESO)(2)](n)center dot 2nH(2)O (14), [Fe(CN)(5)(mu-CN)Ln(H2O)(3)(TMSO)(4)]center dot 1.5H(2)O [Ln = La (15), Nd (16), Gd (18)], cis-[Fe(CN)(4)(mu-CN)(2)sm(H2O)(4)(TMSO)(2)](n) (17) and cis-[Fe(CN)(4)(mu-CN)(2)Ln(H2O)(3)(TMSO)(2)](n)center dot nH(2)O [Ln = Dy (19), Er (20), Yb (21)]. The X-ray structure analyses show that 2-5, 15, 16, and 18 have cyano-bridged dinuclear structures; 1, 6, 7, 9-14, 17, and 19-21 form one-dimensional (ID) chain structures; but 8 is an ionic compound without cyano-bridging. For those complexes with 1D structure, there are also different configurations ascribed to the cis- or trans-coordination of bridging CN- moieties to the Fe-III ion. The coordination of two CN- moieties to one Ln(III) ion is all-trans (N-Ln-N > 90 degrees), mainly due to the steric effect of Fe(CN)(6)(3-) entities. Further, such complexes feature extensive O-H...O and O-H...N hydrogen bonds that give rise to different three-dimensional (3D) supramolecular structures and stabilize and influence these structures. The differences of composition and structure of these complexes may be attributed to the structural differences of the three monosulfoxide blocking ligands, as well as different lanthanide ions to some extent, although a general rule (or underlying relationship) can not be deduced.
机译:Ln(NO3)(3)中心点水溶液(Ln = La,Nd,Sm,Gd,Dy,Er和Yb)与K-3 [Fe(CN)(6)]和三种单亚砜的自组装反应配体,二甲基亚砜(DMSO),二乙基亚砜(DESO)和四亚甲基亚砜(TMSO)分别在水中生成三类21 Ln(III)-Fe-III配合物,具有十种组成和结构:顺式[[ Fe(CN)(4)(mu-CN)(2)La(H2O)(3)(DMSO)(3)](n)中心点nH(2)O(1),[Fe(CN)(5 )(mu-CN)Ln(H2O)(3)(DMSO)(4)]中心点H2O [Ln = Nd(2),Dy(5)],[Fe(CN)(5)(mu-CN) Ln(H2O)(4)(DMSO)(3)]中心点H2O [Ln = Sm(3),Gd(4)],反式[Fe(CN)(4)(mu-CN)(2)Ln (H2O)(DMSO)(4)],[Ln = Er(6),Yb(7)],[Fe(CN)(6)] [La(H2O)(6)(DESO)(3)]]( 8),反式[Fe(CN)(4)(mu-CN)(2)Ln(H2O)(4)(DESO)(2)](n)中心点2nH(2)O [Ln = Nd( 9),Sm(10),Gd(11),Dy(12),Er(13)],顺式[Fe(CN)(4)(mu-CN)(2)Yb(H2O)(3)( DESO)(2)](n)中心点2nH(2)O(14),[Fe(CN)(5)(mu-CN)Ln(H2O)(3)(TMSO)(4)]中心点1.5 H(2)O [Ln = La(15),Nd(16),Gd(18)],顺式[Fe(CN)(4)(mu-CN)(2)sm(H2O) (4)(TMSO)(2)](n)(17)和顺式[Fe(CN)(4)(mu-CN)(2)Ln(H2O)(3)(TMSO)(2)] [ n)中心点nH(2)O [Ln = Dy(19),Er(20),Yb(21)]。 X射线结构分析表明2-5、15、16和18具有氰基桥连的双核结构。 1、6、7、9-14、17和19-21形成一维(ID)链结构;但是8是没有氰基桥联的离子化合物。对于具有一维结构的那些配合物,也存在不同的构型,其归因于将CN-部分桥接至Fe-III离子的顺式或反式配位。两个CN部分与一个Ln(III)离子的配位是全反式(N-Ln-N> 90度),这主要是由于Fe(CN)(6)(3-)实体的空间效应。此外,此类络合物具有广泛的O-H ... O和O-H ... N氢键,从而形成不同的三维(3D)超分子结构并稳定并影响这些结构。这些复合物的组成和结构差异可能归因于三种单亚砜封闭配体的结构差异,以及一定程度上不同的镧系元素离子,尽管不能推论出一般规则(或基本关系)。

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