合作性B−H债券激活:直接通往单金属二二和二二酸盐复合物的途径
Suvam Saha1, Pekham Chakrabortty1, Sundargopal Ghosh1
1Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu, 600036, India.
Chemistry (Weinheim an der Bergstrasse, Germany)
|July 30, 2025
概括
这项研究合成了和复合物与半联体,以研究B-H键激活. 这些复合物表现出与的独特反应性,形成了新的二博和二酸物种,突出显示了对金属中心行为的联结体影响.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 催化剂是一种催化剂.
背景情况:
- 血结合体在稳定反应性金属中心和促进小分子激活方面发挥着至关重要的作用.
- 和复合物因其催化应用而被广泛研究,特别是在B-H键激活中.
- 了解连接体设计和金属反应性之间的相互作用是开发新合成方法的关键.
研究的目的:
- 合成和表征新型的 κ2-N,E 化和复合物,其中包括含有血性/-二连接物.
- 通过使用 (BH3·THF) 来研究这些复合物的B-H键激活能力.
- 阐明和中心激活B-H键的反应机制和结构结果.
主要方法:
- 通过盐转化反应合成和复合物.
- 使用光谱技术 (NMR,质谱) 进行合成复合物的表征.
- 复合物与 (BH3·THF) 的反应,以研究B-H键激活通路.
主要成果:
- 成功合成了用 κ2-N,E 化半结合体的和复合体.
- 复合物在与BH3·THF反应时产生单金属二博(5) 和过渡金属二二化合物复合物.
- 复合物通过B-H键插入和环滑动产生二酸 (dihydroborate rhodium) 复合物,其中一个复合物形成了双双的子结构.
结论:
- /-二连体的半性质显著影响和复合体中的B-H键激活通路.
- 复合物稳定了新型的二博碎片,而复合物经历了不同的B-H插入和环滑动机制.
- 该研究表明,这些复合物在激活小分子和形成独特的含有有机金属结构方面具有潜力.
更多相关视频
相关概念视频
03:08Hydroboration-Oxidation of Alkenes
9.0K
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
9.0K
02:36Regioselectivity and Stereochemistry of Hydroboration
8.4K
A significant aspect of hydroboration–oxidation is the regio- and stereochemical outcome of the reaction.
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
8.4K
02:47Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
18.9K
Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
18.9K
03:24Hybridization of Atomic Orbitals I
49.0K
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...
49.0K
02:15Preparation of Alcohols via Addition Reactions
6.4K
Overview
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
6.4K
02:42Valence Bond Theory
9.7K
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...
9.7K