介质化物和转移到上
Magnus R Buchner1, Fabian Dankert1,2, Chantsalmaa Berthold1
1Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032, Marburg, Germany.
Chemistry (Weinheim an der Bergstrasse, Germany)
|August 17, 2023
概括
研究人员研究了六甲基环三素 (D3) 与化和化合物的反应性. 通过化物和转移反应合成了新的三核复合物,产生了新型西拉诺酸盐.
科学领域:
- 有机金属化学 有机金属化学
- 化学 化学
- 的化学成分 的化学成分
背景情况:
- 六甲基循环三氧xane (D3) 是一种具有已知的反应性的循环氧xane.
- 烯化合物,特别是化物,表现出不同的化学行为.
- 有机化合物在材料科学和合成中至关重要.
研究的目的:
- 调查六甲基环三素 (D3) 与各种前体的反应性.
- 探索有机化合物的新型合成途径.
- 描述由此产生的三核复合物及其特性.
主要方法:
- D3与化 (BeCl2),化 (BeBr2),化 (BeI2) 和烯复合体 ([Be3Ph6]3) 的反应.
- 使用分析技术 (例如NMR,X射线晶体学) 进行反应产品的表征.
- 研究化物和转移机制从到.
主要成果:
- BeCl2与D3.3显示出非选择性的反应性.
- BeBr2,BeI2和[Be3Ph6]3与D3清洁地反应,形成三核复合体:[Be3Br2(OSiMe2Br) 4],[Be3I2(OSiMe2I) 4],和[Be3Ph2(OSiMe2Ph) 4].
- 这些反应代表了从到的前所未有的化物,化物和转移.
结论:
- 这项研究表明,一种通用的合成途径可以获得新型的和基酸盐.
- 三核复合物可以通过与D3.3的受控反应来获得.
- 这项工作扩大了有机和化学的范围.
相关概念视频
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8.3K
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Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
8.3K
Electrophilic Addition to Alkynes: Hydrohalogenation
10.0K
Electrophilic addition of hydrogen halides, HX (X = Cl, Br or I) to alkenes forms alkyl halides as per Markovnikov's rule, where the hydrogen gets added to the less substituted carbon of the double bond. Hydrohalogenation of alkynes takes place in a similar manner, with the first addition of HX forming a vinyl halide and the second giving a geminal dihalide.
10.0K
Halogenation of Alkenes
15.8K
Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
15.8K
Radical Substitution: Allylic Bromination
5.1K
In organic synthesis, the formation of products can be altered by changing the reaction conditions. For example, a dibromo addition product is formed when propene is treated with bromine at room temperature. In contrast, propene undergoes allylic substitution in non-polar solvents at high temperatures to give 3-bromopropene. In order to avoid the addition reaction, the bromine concentration must be kept as low as possible throughout the reaction. This can be achieved using N-bromosuccinimide...
5.1K
Electrophilic 1,2- and 1,4-Addition of X2 to 1,3-Butadiene
2.5K
Electrophilic addition of halogens to alkenes proceeds via a cyclic halonium ion to form a 1,2-dihalide or a vicinal dihalide.
2.5K
Electrophilic 1,2- and 1,4-Addition of HX to 1,3-Butadiene
5.8K
The electrophilic addition of hydrogen halides such as HBr to alkenes and nonconjugated dienes gives a single product as per Markovnikov’s rule.
5.8K

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