双核 bis-μ-oxo复合物的分子和电子结构具有钻石核心结构图案
Anna-Corina Schmidt1, Frank W Heinemann, Wayne W Lukens
1Inorganic Chemistry, Department of Chemistry and Pharmacy, Friedrich-Alexander University of Erlangen-Nürnberg (FAU) , Egerlandstr. 1, 91058 Erlangen, Germany.
Journal of the American Chemical Society
|June 18, 2014
概括
这项研究详细介绍了新型氧复合物的合成和特征,揭示了强大的反铁磁合和氧核的振动特征.
科学领域:
- 有机金属化学 有机金属化学
- 化学 的化学
- 协调化学 协调化学
背景情况:
- 具有多重键的复合体对于理解f元素反应性至关重要.
- 氧复合物的反应性和磁性属性尚未完全理解.
- 支持三环环 (tacn) 的复合体为探索f元素化学提供了一个独特的平台.
研究的目的:
- 合成和表征新的 (III), (V) 和 (VI) 氧化复合物.
- 为了研究二核氧复合物的氧化还原行为.
- 为了阐明这些复合物的磁性和结构图案.
主要方法:
- 一个U(III) 前体的多键转化反应与甲和CO2.
- 合成和独立表征U(V) imido和U(V) /U(V) oxo中间体.
- 氧化还原定位,UV/vis/NIR,EPR光谱学,SQUID磁化研究和同位素标记 (18)).
主要成果:
- 通过U(V) imido中间体形成一个双核U(V) /U(V) bis(μ-oxo) 桥梁复合体.
- 证明丰富的氧化还原行为,在减少时产生混合价值的U (IV) /U (V) 和U (IV) /U (IV) 复合体.
- 氧化导致单核U(VI) 氧复合物;在U(V) 离子之间观察到强烈的抗铁磁合.
- 使用 (18) O 标签,对[U(μ-O) 2U]核心的振动特征进行明确的分配.
结论:
- 已经建立了一条新的合成途径,以获得氧复合物.
- 这项研究为氧物种的氧化还原和磁性特性提供了深入的见解.
- 振动分析证实了[U(μ-O) 2U]核心的结构图案,进步了对化学的理解.
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