One-step synthesis of heteroleptic rare-earth amide complexes featuring fluorenyl-tethered N-heterocyclic carbene ligands
One-step synthesis of heteroleptic rare-earth amide complexes featuring fluorenyl-tethered N-heterocyclic carbene ligands
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DOI：
10.1016/j.poly.2021.115021
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发表时间：
2021-03
期刊：
影响因子：
2.6
通讯作者：
Kieren J. Evans;Paul A. Morton;C. Sangster;S. M. Mansell
中科院分区：
文献类型：
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作者：
Kieren J. Evans;Paul A. Morton;C. Sangster;S. M. Mansell
[9-(C13H9)C2H4N(CH)C2H2N(Me)][Br1](I)与[Y{N(SiMe3)2}3]反应生成了具有异构性的Y配合物[Y{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}(Br){N(SiMe3)2}](1)，其中含有一个具有钢琴凳子构型的Y中心和四个不同的给体。由于Nd3+的离子半径较大，[Nd3+]与[Nd3+(N(SiMe3)2}3]反应生成了二聚体配合物[Nd{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}(μ-Br){N(SiMe3)2}]2(2)，单晶。I与含有较大La~(3+)离子的[La{N(SiMe_3)_2}_3]反应生成多个配位重分布产物，包括[La{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}{N(SiMe3)2}2](3)和[La{(η_5-C_13H_8)C_2H_4N(κ-C)C_2H_2N(Me)}2(Br)](4)。
Reaction of the fluorenyl-tethered imidazolium bromide salt [9-(C13H9)C2H4N(CH)C2H2N(Me)][Br] (I) with [Y{N(SiMe3)2}3] generated the heteroleptic yttrium complex [Y{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}(Br){N(SiMe3)2}] (1), which contains an Y centre with a piano-stool geometry and four different donors. The reaction ofIwith [Nd{N(SiMe3)2}3] led to single crystals of the dimeric Nd complex [Nd{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}(μ-Br){N(SiMe3)2}]2(2), likely due to the larger ionic radius of Nd3+. Reactions ofIwith [La{N(SiMe3)2}3], which contains the larger La3+ion, demonstrated the formation of multiple products from ligand redistribution, including [La{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}{N(SiMe3)2}2] (3) and [La{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}2(Br)] (4).