Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...
Cycloalkanes02:28

Cycloalkanes

Cycloalkanes are saturated cyclic hydrocarbons with carbon atoms arranged in the form of rings. They have two fewer hydrogen atoms than the corresponding acyclic alkane; therefore, their general formula is CnH2n. The structural formulas of cycloalkanes are simplified using the line-angle representation. The regular polygons are used to represent the cycloalkane rings, with each side representing a carbon-carbon bond.
The IUPAC nomenclature of cycloalkanes follows similar rules that apply to...
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation01:28

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation02:47

Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation

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.
Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview01:32

Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview

Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction mixture.
Carbocations02:10

Carbocations

Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an electron-deficient species with the central carbon atom having six electrons and three bonded atoms. The central carbon in a carbocation is sp2 hybridized with trigonal planar geometry. It has an empty p orbital perpendicular to the plane of the structure that can accept electrons. Thus, carbocations act as strong electrophiles and may react with any...

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Academic achievement in children born extremely preterm: a cohort study.

Archives of disease in childhood. Fetal and neonatal edition·2026
Same author

Long-Term Societal Costs After Births Before 24 Weeks of Gestation in Sweden.

Acta paediatrica (Oslo, Norway : 1992)·2026
Same author

σ-Resonance Stabilization of Aminomethylene by N-Halogenation.

Journal of computational chemistry·2026
Same author

Low serum sphingosine-1-phospate and its chaperone ApoM associate with retinopathy of prematurity.

Journal of lipid research·2026
Same author

Neurodevelopmental Outcomes 12 Years After Extremely Preterm Birth in Sweden.

Pediatrics·2026
Same author

Ambident Reactivity in the Phenyl + NO Radical Recombination.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026
Same journal

Carbonylative Aminative Suzuki-Miyaura Coupling: Pd-Catalyzed Synthesis of Amides from Vinyl/Aryl Halides and Boronic Acids.

Journal of the American Chemical Society·2026
Same journal

Divergent Asymmetric Synthesis of Glutinosasins A-E.

Journal of the American Chemical Society·2026
Same journal

Ultrastrong Polyketone Hot-Melt Adhesives Enabled by Ni-Catalyzed Carbonylative Polymerization.

Journal of the American Chemical Society·2026
Same journal

Programmable Anomalous Photovoltaics Enabled by Light-Electric Dual-Field Control.

Journal of the American Chemical Society·2026
Same journal

Biomimetic Redox-Mediated Proton Relay in Nanoreactors for Photocatalysis.

Journal of the American Chemical Society·2026
Same journal

The Sulfur Monoxide-Water Complex.

Journal of the American Chemical Society·2026
查看所有相关文章

相关实验视频

Updated: May 30, 2026

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)
06:34

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)

Published on: June 20, 2014

循环基氧碳烯 (Cyclopropylhydroxycarbene) 是一种碳化合物.

David Ley1, Dennis Gerbig, J Philipp Wagner

  • 1Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany.

Journal of the American Chemical Society
|July 29, 2011
PubMed
概括
此摘要是机器生成的。

环基基,一种新型分子,由于其环基组,具有显著延长的半衰期. 这种稳定性归因于它的π-捐赠能力和观察到的[1,2]H-道化行为.

更多相关视频

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
10:44

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Published on: April 19, 2019

相关实验视频

Last Updated: May 30, 2026

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)
06:34

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)

Published on: June 20, 2014

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
10:44

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Published on: April 19, 2019

科学领域:

  • 物理化学 物理化学
  • 有机化学 有机化学
  • 频谱学是一种光谱学.

背景情况:

  • 碳是有机合成中至关重要的高度反应性的中间体.
  • 氧碳是一种特殊的碳类,具有独特的电子特性.
  • 了解碳稳定性和反应性是控制化学变化的关键.

研究的目的:

  • 为了合成和描述环基碳.
  • 调查环基基的反应性和稳定性,特别是其道化行为.
  • 阐明环替代剂在调节碳特性中的作用.

主要方法:

  • 在高真空中,在960°C的温度下对环基酸进行高真空闪光热解.
  • 在11K的固体阿贡中进行矩阵隔离.
  • 红外 (IR) 光谱用于表征.
  • 光解研究观察碳反应.
  • 计算化学 (CCSD ((T) /cc-pVnZ//M06-2X/6-311++G ((d,p)) 和温泽尔-克拉默斯-布里洛因形式主义用于道分析.

主要成果:

  • 基基基基被成功生成和表征.
  • 在光解后,碳经历了环扩张到新型化合物环丁-1--1-.
  • 在矩阵中分离出来的环烯碳酸表现出[1,2]H道化,产生环烯碳酸.
  • 与母基甲基相比,环基组显著增加了碳的半衰期 (τ = 17.8 h 在11-20 K) 与母基甲基相比,归因于π-捐赠者效应.
  • O-减肥的模拟证实了在该配置中没有道.

结论:

  • 环基基是第一个具有显著延长半衰期的基基.
  • 环烯基部分的π-捐赠能力是稳定氧碳化合物的主要因素.
  • 替代剂的电子供体能力对于确定氧碳半衰期至关重要.