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相关概念视频

Nomenclature of Alkynes02:39

Nomenclature of Alkynes

18.5K
Alkynes are unsaturated hydrocarbons characterized by the presence of carbon-carbon triple bonds and have a general formula CnH2n-2. The nomenclature of alkynes follows a set of rules similar to alkanes and alkenes; however, alkynes bear the suffix "-yne" instead of "-ane" or "-ene." There are two approaches to naming alkynes:
18.5K
Preparation of Alkynes: Alkylation Reaction02:27

Preparation of Alkynes: Alkylation Reaction

10.3K
Introduction
Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.
10.3K
Structure and Physical Properties of Alkynes02:37

Structure and Physical Properties of Alkynes

10.8K
Introduction:
In nature, compounds containing both carbon and hydrogen are known as "hydrocarbons". Aliphatic hydrocarbons are compounds whose molecules contain saturated single bonds (i.e., alkanes) or unsaturated double or triple bonds. Alkenes contain carbon–carbon double bonds and have a structural formula CnH2n. Unsaturated hydrocarbons containing carbon–carbon triple bonds are called "alkynes" and are structurally represented by the formula CnH2n-2.
The...
10.8K
Nomenclature of Alkenes02:29

Nomenclature of Alkenes

12.1K
The IUPAC naming system for alkenes replaces -an- with -en- in the corresponding parent alkanes. Accordingly, a simple alkene replaces the -ane suffix of the alkane with -ene.
As per the IUPAC rules, the longest carbon chain containing the maximum number of double bonds is identified as the parent chain and is numbered such that the doubly bonded carbon atoms receive the lowest possible numbers. The location of the double bond is indicated by the number of its first carbon atom. In branched...
12.1K
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

7.8K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
7.8K
Electrophilic Addition to Alkynes: Halogenation02:38

Electrophilic Addition to Alkynes: Halogenation

8.3K
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.
8.3K

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相关实验视频

Updated: Jul 21, 2025

Facile Preparation of 2Z,4E-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
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Facile Preparation of 2Z,4E-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate

Published on: June 21, 2017

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赫萨基斯-TIPS-基化非:持久性和可处理性

Nico Zeitter1, Nikolai Hippchen1, Anna Weidlich2

  • 1Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.

Chemistry (Weinheim an der Bergstrasse, Germany)
|July 25, 2023
PubMed
概括
此摘要是机器生成的。

新的稳定和可溶性无烯,具有三烯 (TIPS) 乙烯基组,显示有机电子的潜力. 这些化合物在溶液处理的晶体管中表现出双极电荷传输.

关键词:
亚酸是一种酸盐.场效应晶体管的领域效应晶体管.没有甲基甲基.有机电子产品 有机电子产品稳定 稳定 稳定 稳定绝缘屏蔽 绝缘屏蔽 绝缘屏蔽

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Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
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Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
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Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
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Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
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科学领域:

  • 有机化学 有机化学
  • 材料科学 材料科学 材料科学
  • 固态物理 固态物理

背景情况:

  • 无烯是具有独特电子特性的大型多环芳化合物.
  • 它们固有的不稳定性和不良溶解性限制了它们的实际应用.
  • 开发稳定和可加工的非衍生物对于推进有机电子技术至关重要.

研究的目的:

  • 合成和表征具有增强稳定性和可溶性的新型替代无乙烯.
  • 研究这些新型非化合物的结构和电子特性.
  • 在有机电子设备中评估非衍生物的性能.

主要方法:

  • 合成了四种替代的非衍生物.
  • 使用紫外线和EPR光谱学进行了表征.
  • 通过X射线晶体学进行结构分析.
  • 设备制造和测试一种溶液处理晶体管.

主要成果:

  • 合成的nonacenes拥有六个战略位置的trisopropylsilyl (TIPS) -ethynyl组,导致前所未有的稳定性和可溶性.
  • 化合物在固体状态下稳定数周,在稀释溶液中呈现5-9小时的半衰期.
  • X射线结晶学证实了两个非衍生物的结构.
  • 一种非衍生物在溶液处理的晶体管中证明了双极电荷传输,其电子流动性 (μe) 为0.007 cm2/Vs,孔流动性 (μh) 为0.023 cm2/Vs.

结论:

  • 加入TIPS-乙烯基组显著提高了非的稳定性和可溶性.
  • 这些新型的非烯代表着有机电子应用的有前途的材料类.
  • 证明的双极电荷传输为开发先进的有机半导体设备开辟了道路.