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Magnetism in heterobi- and hetrotrimetallic chains based on the use of [WV(bipy)(CN)6]- as a metalloligand
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2017-12-21 , DOI: 10.1002/ejic.201701245
Maria-Gabriela Alexandru 1 , Diana Visinescu 2 , Sergiu Shova 3 , Marius Andruh 4 , Francesc Lloret 5 , Miguel Julve 5
Affiliation  

Two new heterobi- and trimetallic chains of formula ∞1[{MnII(pyim)2}{(µ-NC)2WV(bipy)(CN)4}][WV(bipy)(CN)6] (1) and ∞1[{CuIIMnIIL}{(µ-NC)3WV(bipy)(CN)3}][WV(bipy)(CN)6]·0.75H2O·2MeCN (2) were obtained by reacting the cyanido-based AsPh4[W(bipy)(CN)6] heteroleptic complex with the pre-formed [MnII(pyim)2]2+ (1) and [CuIIMnIIL]2+ (2) complexes [bipy = 2,2'-bipyridine, pyim = 2-(1H-imidazol-2-yl)pyridine and H2L = macrocyclic Schiff-base resulting from the stepwise condensation of 2,6-diformyl-p-cresol with ethylenediamine and diethylenetriamine]. The structure of 1 consists of cationic cyanido-bridged {MnIIWV} chains, assembled from [WV(bipy)(CN)6]- spacers, each one coordinating in a bis-monodentate fashion, two [MnII(pyim)2]2+ nodes, and [WV(bipy)(CN)6]- counteranions. Compound 2 comprises a positively charged 1D coordination polymer, built from [WV(bipy)(CN)6]- cyanido metalloligands that act as tris-monodentate spacers towards [CuIIMnIIL]2+ complexes, the entire assembly being neutralized by [WV(bipy)(CN)6]- anions. The magnetic susceptibility of 1 and 2 investigated down to 1.9 K is characteristic of 1D ferrimagnetic behavior with minima in the MT versus T plots at 35 (1) and 20 K (2).



中文翻译:

基于[WV(bipy)(CN)6]-作为金属配体的异双金属和异三金属链中的磁性

两条新的式为∞1[{MnII(pyim)2} {(µ-NC)2WV(bipy)(CN)4}] [WV(bipy)(CN)6](1)和∞的杂金属和三金属链通过使基于氰基的AsPh4 [W]反应获得1 [{CuIIMnIIL} {(μ-NC)3WV(bipy)(CN)3}] [WV(bipy)(CN)6]·0.75H2O·2MeCN(2) (bipy)(CN)6]杂配物,具有预先形成的[MnII(pyim)2] 2+(1)和[CuIIMnIIL] 2+(2)配合物[bipy = 2,2'-联吡啶,pyim = 2 -(1H-咪唑-2-基)吡啶和H2L = 2,6-二甲酰基-对甲酚与乙二胺和二亚乙基三胺的逐步缩合产生的大环席夫碱]。1的结构由阳离子氰基桥联的{MnIIWV}链组成,这些链是由[WV(bipy)(CN)6]-间隔基组装而成的,每个间隔基以双单齿方式配位,两个[MnII(pyim)2] 2+节点和[WV(bipy)(CN)6]-抗衡阴离子。化合物2包含带正电荷的一维配位聚合物,该聚合物由[WV(bipy)(CN)6]-氰基金属配体构成,它们充当[CuIIMnIIL] 2+配合物的三单齿​​间隔基,整个组件被[WV(bipy)中和)(CN)6]-阴离子。1和2的低至1.9 K的磁化率是1D铁磁行为的特征,在MT与T曲线的35(1)和20 K(2)处极小。

更新日期:2017-12-21
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