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相关概念视频

Valence Bond Theory02:42

Valence Bond Theory

8.6K
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...
8.6K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

376
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
376
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

20.8K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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...
20.8K
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

520
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
520
Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

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sp3d and sp3d 2 Hybridization
32.3K
Colors and Magnetism03:02

Colors and Magnetism

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Color in Coordination Complexes
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...
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Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
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B-P 合:金属稳定型酸复合物

Sourav Gayen1, Sampad Shyamal1, Stutee Mohapatra1

  • 1Department of Chemistry, Indian Institution of Technology, Madras, Chennai, 600036, India.

Chemistry (Weinheim an der Bergstrasse, Germany)
|November 27, 2023
PubMed
概括

这项研究引入了一种新的方法,用于创建-键,使用-酸盐复合物,避免传统的脱水合剂. 这一进步为合成独特的异原子环系统提供了新的途径.

关键词:
酸是什么意思 酸是什么意思胺酸酸是一种酸.酸是一种酸.鲁是的元素之一.

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科学领域:

  • 有机金属化学 有机金属化学
  • 合成化学 合成化学
  • 催化剂是一种催化剂.

背景情况:

  • - (B-P) 键形成的传统方法通常依赖于-脱水合剂.
  • 为B-P合开发替代性,高效的合成路径对于获得新型化学结构至关重要.
  • 鲁复合体为键激活和形成提供了独特的反应性.

研究的目的:

  • 建立一个新的B-P合反应的合成方法,不使用氨酸-氨酸脱水合剂.
  • 合成和描述具有B-P键的新型含异环.
  • 研究B-P键形成的机制和电子特性.

主要方法:

  • 一个8组金属 σ-酸复合物的合成,特别是一个复合物 [{κ3 -H,S,S'-BH2L2}Ru{κ3 -H,H,S-BH3L}] (L=NC5H4S),标记为1.
  • 复合物1与二二 (PPh2Cl) 发生反应,产生1,5-P,S化Rudihydridoborate物种 (2).
  • 探讨涉及复合物1和Ru-bis (((dihydridoborate) 复合物 (5) 与二次氧化物 (SPO) 和酸盐连接体的反应.

主要成果:

  • 通过插入素部分通过 σ(Ru...H-B) 结合相互作用的裂解来实现一种新的 B-P 键形成,形成复合体 2.
  • 综合体2有一个罕见的,全异原子的六环,具有船形形状.
  • 与二次氧化物和酸连接体的反应产生了新型酸 (酸) 合并的Ru (酸) (二酸) 复合物 (6和7).

结论:

  • 已经成功开发了一种用于B-P合的新合成路径,利用 σ-酸盐复合物.
  • 该研究证明了独特的异原子环系统的形成,并通过过渡金属稳定提供了对B-P合的电子见解.
  • 研究了B-P键形成的替代途径,导致新型有机金属复合物的合成.