Novel self-assembled supramolecular architectures of Mn(ii) ions with a hybrid pyrazine-bipyridine ligand

Wa??sa-Chorab M.; Kubicki M.; Korabik M.; Patroniak V.

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Novel self-assembled supramolecular architectures of Mn(ii) ions with a hybrid pyrazine-bipyridine ligand

机译：具有混合吡嗪-联吡啶配体的Mn（ii）离子的新型自组装超分子结构

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A new hybrid pyrazine-bipyridine ligand L (C_(26)H _(20)N_6) and its complexes with Mn(NO_3) _2, Mn(ClO_4)_2, MnCl_2 and MnBr _2 have been synthesised. By the self-assembly of L and Mn(ii) ions three different kinds of supramolecular complexes have been obtained: binuclear baguette complex [Mn_2L(H_2O)_6](NO _3)_4·2.5H_2O 1 and tetranuclear [2 × 2] grid-type complex [Mn_4L_4](ClO_4) _8·2.5(CH_3CN)·2CH_3OH 2 and mononuclear complexes [MnL_2]X_2 (where X = Cl~-3 and X = Br~-4). Crystal structures and magnetic properties of Mn(ii) complexes 1 and 2 have been also investigated. The crystal structures reveal that in both 1 and 2 complexes the Mn(ii) ions have coordination number 6 and distorted octahedral coordination geometry. In 2 four metal cations and four ligands have assembled into a grid-type [2 × 2] array, with a perchlorate anion occupying the central cavity, with clearly a good fit for the center of the cavity. The perchlorate anion, in contrast to the nitrate anion, probably acts as a template in the formation of tetranuclear grid-type complexes. Magnetic susceptibility measurements indicate that the Mn(ii) ions are all high spin, and in both 1 and 2 complexes there are weak antiferromagnetic interactions between Mn(ii) ions.

机译：合成了新的杂嗪-联吡啶配体L（C_（26）H_（20）N_6）及其与Mn（NO_3）_2，Mn（ClO_4）_2，MnCl_2和MnBr_2的配合物。通过L和Mn（ii）离子的自组装，获得了三种不同类型的超分子复合物：双核长方形复合物[Mn_2L（H_2O）_6]（NO _3）_4·2.5H_2O 1和四核[2×2]网格型配合物[Mn_4L_4]（ClO_4）_8·2.5（CH_3CN）·2CH_3OH 2和单核配合物[MnL_2] X_2（其中X ＝ Cl〜-3，X ＝ Br〜-4）。还研究了Mn（ii）配合物1和2的晶体结构和磁性。晶体结构表明，在1和2个络合物中，Mn（ii）离子的配位数为6，八面体配位几何形状也变形。在2个中，四个金属阳离子和四个配体已组装成网格型[2×2]阵列，其中高氯酸根阴离子占据了中心腔，显然非常适合腔中心。与硝酸根阴离子相反，高氯酸根阴离子可能充当四核网格型络合物形成的模板。磁化率测量表明Mn（ii）离子均具有很高的自旋性，并且在1和2个配合物中，Mn（ii）离子之间的反铁磁相互作用较弱。

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《Dalton transactions: An international journal of inorganic chemistry》 |2013年第26期|共9页
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Wa??sa-Chorab M.; Kubicki M.; Korabik M.; Patroniak V.;
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Novel; architectures; hybrid;

机译：小说;建筑;混合;

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1. Novel self-assembled supramolecular architectures of Mn(ii) ions with a hybrid pyrazine-bipyridine ligand [J] . Wa??sa-Chorab M., Kubicki M., Korabik M., Dalton transactions: An international journal of inorganic chemistry . 2013,第26期

机译：具有混合吡嗪-联吡啶配体的Mn（ii）离子的新型自组装超分子结构
2. Novel self-assembled supramolecular architectures of Mn(ii) ions with a hybrid pyrazine-bipyridine ligand [J] . Wa??sa-Chorab M., Kubicki M., Korabik M., Dalton transactions: An international journal of inorganic chemistry . 2013,第26期

机译：具有混合吡嗪-联吡啶配体的Mn（ii）离子的新型自组装超分子结构
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Novel self-assembled supramolecular architectures of Mn(ii) ions with a hybrid pyrazine-bipyridine ligand

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