氧化原子转移到三化合物中,形成Mn6 (((μ6-E) (E = O,N) 集群,具有间歇性氧化物和化物功能
Alison R Fout1, Qinliang Zhao, Dianne J Xiao
1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge Massachusetts 02138, USA.
Journal of the American Chemical Society
|September 28, 2011
概括
研究人员合成了一种新的三核复合体. 这种复合物与氧和试剂反应,形成独特的micro(6) -oxo和micro(6) -nitride六核复合物,扩大无机化学.
科学领域:
- 无机化学 无机化学 有机化学
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
背景情况:
- 复合物在各种催化过程中至关重要.
- 开发具有特定功能的新型多核复合体是研究的一个活跃领域.
- 了解团与氧和等小分子的反应性,是设计新催化剂的关键.
研究的目的:
- 通过六酸连接体合成和表征一种新的三核复合物.
- 为了研究这个复合物的活性与氧原子转移试剂和无机亚酸.
- 探索由此产生的多核氧和化物复合物的结构和电子特性.
主要方法:
- 三核复合物的合成和表征 ((H) L) Mn) 3 (thf) 3 (thg) 3).
- 三核复合体与O原子转移试剂的反应,形成一个微(6) -oxo复合体.
- 与无机亚酸的反应形成六核化物复合物,随后发生氧化.
- 电子偏磁共振 (EPR) 谱学和X射线晶体学用于结构和电子分析.
主要成果:
- 一种新的三核复合物, ((H) L) Mn ((3) ((thf) ((3),已成功合成.
- 该复合物很容易与O-原子转移试剂形成一个微(6) -oxo六核复合物.
- 与亚酸的反应产生六核化物复合物,可以进一步氧化.
- EPR和结构分析区分了氧化物和化物复合物,揭示了不同的氧化状态.
结论:
- 六酸联体平台使稳定的多核复合物的形成成为可能.
- 合成的三核复合体对氧和物种表现出多功能反应性.
- 这项研究提供了关于微6和微6二集群的结构多样性和电子特性的见解.
相关概念视频
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02:58Properties of Transition Metals
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
02:48Ionic Bonding and Electron Transfer
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
02:57Coordination Number and Geometry
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02:51Metal-Ligand Bonds
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In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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03:02Colors and Magnetism
Color in Coordination Complexes
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When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.