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Updated: Mar 4, 2026

Efficient Synthesis of All-Carbon Quaternary Centers via the Conjugate Addition of Functionalized Monoorganozinc Bromides
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Efficient Synthesis of All-Carbon Quaternary Centers via the Conjugate Addition of Functionalized Monoorganozinc Bromides

Published on: May 26, 2019

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通过监管协调债券来实现 (II) 化的多重后发光

Hongli Yu1, Yibo Cui1, Ruibin Hao1

  • 1The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)
|March 3, 2026
PubMed
概括

研究人员使用基于的化物材料开发了一种新的防伪系统. 这些材料表现出可调节的室温光,实现了超出简单空间模式的高级安全功能.

关键词:
多层次的反假冒行动.在室温光光.零维 (0D) 的混合金属化物.

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Electrophilic Addition to Alkynes: Halogenation

Introduction
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.
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Isomerism in Complexes
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Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
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