一个AsP复合物中间体的三键反应性:来自分子的合成,As(4)
Heather A Spinney1, Nicholas A Piro, Christopher C Cummins
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
Journal of the American Chemical Society
|October 22, 2009
概括
研究人员激活了四聚合物 (As(4) 来形成新的diniobium和niobium复合物. 这项工作介绍了新的-联体及其在合成复杂的多环有机框架和独特的循环-AsP(2) 集群中的使用.
科学领域:
- 有机金属化学 有机金属化学
- 主群 化学 化学
- 合成化学 合成化学
背景情况:
- 存在于P(4),但P(2) 可以在温和的条件下产生.
- ,一个更重的第15组元素,存在于As(4),但不稳定,恢复到其金属形式.
- 激活不稳定的等是具有挑战性的,但提供了合成潜力.
研究的目的:
- 报告四聚合物 (As(4) 的激活,用于新型复合物合成.
- 开发新的含的配体和反应性中间体.
- 探索聚环有机框架和独特的集群的合成,其中包括和.
主要方法:
- 作为(4) 激活和随后的复合与.
- 功能化以创建一个新的AsPNMes*连接体.
- 将联体与五碳酸复合,以产生一种反应性中间体.
- 与有机二烯和化物复合物的中间体的捕获反应.
- 使用X射线衍射和计算方法进行表征.
主要成果:
- 成功激活As(4) 导致mu-As(2) diniobium和终端化物复合体.
- 合成AsPNMes*连接体及其五乙烯复合物.
- 产生一个反应性 (AsP) W ((CO) ((5) 中间体.
- 形成双双的迪尔斯-阿尔德 adducts 嵌入ASP单元在多循环框架.
- 通过与酸复合物的反应合成一个循环-AsP(2) 复合物.
结论:
- 在有机金属合成中证明了As(4) 激活和利用的新途径.
- 引入了新的含和的配体和复合物.
- 展示了这些复合体在构建复杂的有机结构和集群中的实用性.
- 提供了关于和在这些新型化合物中的结合的见解.
相关概念视频
Hybridization of Atomic Orbitals II
sp3d and sp3d 2 Hybridization
Hybridization of Atomic Orbitals I
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Valence Bond Theory
Overview of Valence Bond Theory
Resonance
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds.
Radical Reactivity: Overview
Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired molecule. These three...

