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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Directed synthesis of {(Cu2Zn2II)-Zn-II} and {(Cu8Zn8II)-Zn-II} heterometallic complexes
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Directed synthesis of {(Cu2Zn2II)-Zn-II} and {(Cu8Zn8II)-Zn-II} heterometallic complexes

机译:{(Cu2Zn2II)-Zn-II}和{(Cu8Zn8II)-Zn-II}杂金属配合物的定向合成

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摘要

Two new heterometallic complexes [Cu2Zn2(H4L)(2)(CH3COO)(2)Cl-2]center dot 2.5CH(3)OH center dot 0.5H(2)O (1) and [Cu8Zn8-(OH)(8)(H4L)(8)](Cl)(2)(ClO4)(6)center dot 16H(2)O (2) have been synthesised following two different preparative routes, by using the polydentate ligand Bis-tris propane (H6L = 2,2'-(propane-1,3-diyldiimino)bis[2-(hydroxy-methyl)- propane-1,3-diol]). Herein, we describe the synthesis, structure, and magnetic properties of 1, a tetramer which forms in the absence of base and 2, a hexadecanuclear complex with a remarkable double-concentric ring structure that forms in the presence of base. Antiferromagnetic coupling between Cu(II) ions is observed in both compounds despite the long distances between paramagnetic metal centres, due to the involvement of diamagnetic Zn(II) ions in the magnetic exchange pathway.
机译:两个新的杂金属配合物[Cu2Zn2(H4L)(2)(CH3COO)(2)Cl-2]中心点2.5CH(3)OH中心点0.5H(2)O(1)和[Cu8Zn8-(OH)(8) )(H4L)(8)](Cl)(2)(ClO4)(6)中心点16H(2)O(2)已通过两种不同的制备路线,通过使用多齿配体Bis-tris丙烷(H6L)合成= 2,2′-(丙烷-1,3-二基二亚氨基)双[2-(羟基-甲基)-丙烷-1,3-二醇])。在这里,我们描述了1的合成,结构和磁性,这是在不存在碱的情况下形成的四聚体,以及在存在碱的情况下形成的具有明显双同心环结构的六癸核配合物的六聚体。尽管顺磁性金属中心之间的距离很长,但是由于抗磁性Zn(II)离子参与了磁交换路径,所以在两种化合物中都观察到了Cu(II)离子之间的反铁磁耦合。

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