在正方形平面6d1 Th(III) 复合物的合成中研究体效和电子效应
Joseph Q Nguyen1, Justin C Wedal1, Joseph W Ziller1
1Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States.
Inorganic chemistry
|March 19, 2024
概括
研究人员探索了影响(III) 方形平面氧化物复合体形成的因素. 他们发现,不同类型的氧化物配体和还原剂可以产生这些不寻常的Th(III) 复合物,其中一些具有方形平面结构.
科学领域:
- 无机化学 无机化学 有机化学
- 有机金属化学 有机金属化学
- 化学化学 化学
背景情况:
- 不寻常的6d1 Th(III) 方形平面氧化物复合物的形成和晶体结构尚未完全理解.
- 探索这些复合体可以提供有关电子,硬体和反效应的见解,这些效应决定了它们的稳定性和几何.
研究的目的:
- 调查影响6d1 Th(III) 方形平面阿里洛克化物复合物的形成和晶体结构的因素.
- 合成和表征一系列的Th(IV) 四基氧化物) 复合物,并研究它们的降解为Th(III) 种.
- 探索氧化物联体替代剂,还原剂和化剂对产生的Th (III) 复合物的影响.
主要方法:
- 通过盐转化反应,通过ThBr4(DME)2和的氧化盐之间合成Th(IV) 氧化复合物.
- 使用金属 (KC8,Na,Li) 在有或没有结合剂 (密室,皇冠) 的情况下,减少Th(IV) 复合物.
- 使用EPR和紫外线可见光谱学以及X射线衍射进行结构确定,对Th (III) 产品进行表征.
主要成果:
- 一系列的Th(IV) 亚洛克化物复合物,Th(OArR) 4,已经成功合成.
- 减少各种Th{OArR) 4复合体,产生了与已知Th{OArMe) 41-复合体相似的EPR和UV可见光谱的Th{III}物种.
- 减少复合物的X射线质量晶体揭示了Th(III) 的正方形平面协调几何形状.
- 亚里化配体的位不需要化以形成Th (III) 复合体.
- 某些复合物,如Th(Odipp) 4(THF) 2和Th(Odmp) 4(THF) 2,在类似的条件下无法降低到Th(III).
- 作为比较,复合物在减少时显示了阿里洛克联体的四面体排列.
结论:
- 通过减少相应的Th(IV) 前体,可以形成6d1 Th(III) 方形平面阿里化物复合体.
- 亚环氧化物联体的电子和硬质性质,以及减少和结合剂的选择,在减少的结果中起着至关重要的作用.
- 在特定的还原条件下,正方形平面几何学是Th(III) 亚里化物复合物的首选协调模式.
- 这项研究扩大了对的氧化还原化学和协调行为的理解,特别是在较低的氧化状态下.
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