Jove
Visualize
联系我们

相关概念视频

Hydroboration-Oxidation of Alkenes03:08

Hydroboration-Oxidation of Alkenes

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.
Preparation of Alcohols via Addition Reactions02:15

Preparation of Alcohols via Addition Reactions

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...
Acid-Catalyzed Dehydration of Alcohols to Alkenes02:35

Acid-Catalyzed Dehydration of Alcohols to Alkenes

In a dehydration reaction, a hydroxyl group in an alcohol is eliminated along with the hydrogen from an adjacent carbon. Here, the products are an alkene and a molecule of water. Dehydration of alcohols is generally achieved by heating in the presence of an acid catalyst. While the dehydration of primary alcohols requires high temperatures and acid concentrations, secondary and tertiary alcohols can lose a water molecule under relatively mild conditions.
Oxidation of Alcohols02:37

Oxidation of Alcohols

In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
Preparation of Aldehydes and Ketones from Alcohols, Alkenes, and Alkynes01:33

Preparation of Aldehydes and Ketones from Alcohols, Alkenes, and Alkynes

Aldehydes and ketones are prepared from alcohols, alkenes, and alkynes via different reaction pathways. Alcohols are the most commonly used substrates for synthesizing aldehydes and ketones. The conversion of alcohol to aldehyde, which involves the oxidation process, depends on the class of the alcohol used and the strength of the oxidizing agent. For instance, primary alcohol will form an aldehyde when treated with a weak oxidizing agent; however, it gets over-oxidized to a carboxylic acid in...
Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation01:22

Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation

Baeyer–Villiger oxidation converts aldehydes to carboxylic acids and ketones to esters. The reaction uses peroxy acids or peracids and is often catalyzed by acid. The reaction is named after its pioneers, Adolf von Baeyer and Victor Villiger. The reaction is achieved by a wide range of peracids such as m-chloroperoxybenzoic acid (mCPBA), perbenzoic acid (C6H5COOOH), peracetic acid (CH3COOOH), hydrogen peroxide (H2O2), and tert-butyl hydroperoxide (t-BuOOH).
The carbonyl center is activated by...

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

Effects of extracellular DNA from Candida albicans and pneumonia-related pathogens on Candida biofilm formation and hyphal transformation.

Journal of applied microbiology·2014
Same author

Effects of extracellular DNA and DNA-binding protein on the development of a Streptococcus intermedius biofilm.

Journal of applied microbiology·2013
Same author

The nature of the landers-mojave earthquake line.

Science (New York, N.Y.)·1993
Same author

Management of the solitary cold thyroid nodule. A prospective study.

International surgery·1988
Same author

Continental accretion: from oceanic plateaus to allochthonous terranes.

Science (New York, N.Y.)·1981
Same author

Microcracking and healing in granites: new evidence from cathodoluminescence.

Science (New York, N.Y.)·1979
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

相关实验视频

Updated: May 13, 2026

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
08:15

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts

Published on: February 7, 2017

由毛孔液体流动引起的余震?

A Nur, J R Booker

    Science (New York, N.Y.)
    |February 25, 1972
    PubMed
    概括

    大规模的地震会改变流体孔隙压力,削弱岩石,并可能导致延迟骨折. 这种流体流动机制解释了主要地震事件后的余震活动的时间.

    科学领域:

    • 地质物理学 地质物理学
    • 地震学 地震学
    • 岩石力学 岩石力学 岩石力学

    背景情况:

    • 大规模的浅层地震显著影响地的压力和流体系统.
    • 流体孔隙压力的变化在岩石强度和失败中起着至关重要的作用.
    • 余震序列为主震事件后的动态过程提供了洞察力.

    研究的目的:

    • 调查流体孔隙压力变化在地震余震产生中的作用.
    • 探索大地震后由流体流动引起的延迟骨折的机制.
    • 将孔隙压力衰减的理论模型与观察到的余震速率进行比较.

    主要方法:

    • 模拟大地震引起的流体孔隙压力变化.
    • 分析地内的流体流动和再分配过程.
    • 计算的孔隙压力衰减率与观察到的余震数据的比较.

    主要成果:

    • 地震引发流体孔隙压力变化,与应力下降相当.
    • 流体流动导致孔隙压力的缓慢重新分配,降低岩石强度.
    • 孔隙压力衰减的计算速率与观察到的余震速率保持一致.

    结论:

    更多相关视频

    Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte
    10:27

    Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

    Published on: October 5, 2017

    Separation of Aldehydes and Reactive Ketones from Mixtures Using a Bisulfite Extraction Protocol
    09:08

    Separation of Aldehydes and Reactive Ketones from Mixtures Using a Bisulfite Extraction Protocol

    Published on: April 2, 2018

    相关实验视频

    Last Updated: May 13, 2026

    Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
    08:15

    Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts

    Published on: February 7, 2017

    Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte
    10:27

    Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

    Published on: October 5, 2017

    Separation of Aldehydes and Reactive Ketones from Mixtures Using a Bisulfite Extraction Protocol
    09:08

    Separation of Aldehydes and Reactive Ketones from Mixtures Using a Bisulfite Extraction Protocol

    Published on: April 2, 2018

    • 液体孔隙压力变化和随后的再分配是产生余震的可行机制.
    • 由于流体流动而延迟的骨折是大地震的一个重要后果.
    • 拟议的机制为余震活动的时间衰减提供了令人信服的解释.