Homoleptic alkaline earth metal bis(trifluoromethanesulfonyl)imide complex compounds obtained from an ionic liquid
Homoleptic alkaline earth metal bis(trifluoromethanesulfonyl)imide complex compounds obtained from an ionic liquid
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DOI：
10.1021/ic051820l
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发表时间：
2006-04-17
影响因子：
4.6
通讯作者：
Mudring, AV
中科院分区：
文献类型：
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作者：
Babai, A;Mudring, AV
在碱土双（三氟甲磺酰基）亚胺（Tf2N）与离子液体[mppyr][Tf2N] （mppyr = 1,1-N-甲基-N-丙基吡啶）的溶液中，首次结晶出同效碱土双（三氟甲磺酰基）亚胺（Tf2N）配合物[mppyr](2)[Ca(Tt(2)N)(4)]、[mppyr](2)-[Sr(Tf2N)(4)]和[mppyr][Ba(Tf2N)(3)]。在钙和锶化合物中，碱土金属（AE）与四个双齿螯合的Tf2N配体配位形成孤立的（扭曲的）方形反棱镜[AE(Tf2N)(4)]（2-）配合物，并被n -甲基- n -丙基吡啶离子分离。相比之下，钡化合物[mppyr][Ba(Tf2N)(3)]则形成扩展结构。在这里，碱土阳离子被6个氧原子包围，这些氧原子属于3个Tf2N-阴离子，它们以双齿螯合方式配位，另外3个相同配体的氧原子将Ba2+阳离子连接到无限(1)（无限）[Ba(Tf2N)(3)]链上。
The first homoleptic alkaline earth bis(trifluoromethanesulfonyl)imide (Tf2N) complexes [mppyr](2)[Ca(Tt(2)N)(4)], [mppyr](2)-[Sr(Tf2N)(4)], and [mppyr][Ba(Tf2N)(3)] were crystallized from a solution of the respective alkaline earth bis(trifluoromethanesulfonyl)imide and the ionic liquid [mppyr][Tf2N] (mppyr = 1,1-N-methyl-N-propylpyrrolidinium). In the calcium and strontium compounds, the alkaline earth metal (AE) is coordinated by four bidentately chelating Tf2N ligands to form isolated (distorted) square antiprismatic [AE(Tf2N)(4)](2-) complexes which are separated by N-methyl-N-propylpyrrolidinium cations. In contrast, the barium compound, [mppyr][Ba(Tf2N)(3)], forms an extended structure. Here the alkaline earth cation is surrounded by six oxygen atoms belonging to three Tf2N- anions which coordinate in a bidentate chelating fashion, Three further oxygen atoms of the same ligands are linking the Ba2+ cations to infinite (1)(infinity)[Ba(Tf2N)(3)] chains.