Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Structure of Conjugated Dienes01:16

Structure of Conjugated Dienes

7.8K
Introduction
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
7.8K
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction01:16

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

12.7K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
12.7K
π Molecular Orbitals of 1,3-Butadiene01:24

π Molecular Orbitals of 1,3-Butadiene

12.2K
Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
12.2K
Stability of Conjugated Dienes01:28

Stability of Conjugated Dienes

4.5K
Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
4.5K
Electrophilic 1,2- and 1,4-Addition of X2 to 1,3-Butadiene01:14

Electrophilic 1,2- and 1,4-Addition of X2 to 1,3-Butadiene

3.7K
Electrophilic addition of halogens to alkenes proceeds via a cyclic halonium ion to form a 1,2-dihalide or a vicinal dihalide.
3.7K
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

4.0K
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...
4.0K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Roots navigate around decay regions by sensing local pH gradients.

Science (New York, N.Y.)·2026
Same author

Morning glory syndrome with retinal detachment and literature review-a case report.

Frontiers in medicine·2026
Same author

Study on the influence of cementation sequence on the mechanical properties and microstructure of MICP-modified ili loess.

PloS one·2026
Same author

Ag-Doped Phosphate Glass: Structure, Radio-Photoluminescence and Applications.

Materials (Basel, Switzerland)·2026
Same author

Direct RNA Sequencing reveals epitranscriptomic regulation of brain cells and Alzheimer's Disease pathology.

bioRxiv : the preprint server for biology·2026
Same author

Recent Advances in Butyrate Production from Food Waste Fermentation: Key Functional Microbes, Habitat Engineering, and Future Challenges.

Journal of agricultural and food chemistry·2026

関連する実験動画

Updated: Feb 26, 2026

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

11.7K

中性のジボロン含有ヘテロクムレン

Sai Zou1, Ai Zhang1, Pengyu Gao1

  • 1Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.

Journal of the American Chemical Society
|February 25, 2026
PubMed
まとめ

研究者らは、調整可能な幾何構造を持つ新しいホウ素含有ヘテロクムレンを合成しました。これらの化合物は、元素-元素結合を開裂させ、金属錯体を形成するという独自の反応性を示し、ホウ素化学の応用を拡大します。

キーワード:
ホウ素化学ヘテロクムレン金属錯体配位化学有機ホウ素化学

さらに関連する動画

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
13:56

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Published on: October 12, 2019

8.4K
Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
04:51

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

Published on: June 23, 2023

4.3K

関連する実験動画

Last Updated: Feb 26, 2026

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

11.7K
Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
13:56

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Published on: October 12, 2019

8.4K
Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
04:51

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

Published on: June 23, 2023

4.3K

科学分野:

  • 無機化学
  • 有機ホウ素化学
  • 材料科学

背景:

  • ホウ素含有ヘテロクムレンは、独自の特性により最近関心を集めています。
  • 多重結合を持つホウ素種は確立されていますが、B-B多重結合はまれです。

研究 の 目的:

  • B-B多重結合を持つ新しい中性ヘテロクムレンを合成および特徴付けること。
  • 配位子がクムレンの幾何構造に及ぼす影響を調査すること。
  • これらのホウ素クムレンの反応性と潜在的な応用を探求すること。

主な方法:

  • CNBBアーキテクチャを持つ中性ヘテロクムレンの合成。
  • X線回折を用いた構造的特徴付け。
  • 元素-元素結合の開裂および錯体形成を伴う反応性研究。

主要な成果:

  • 非対称B(sp)═B(sp2)ユニットを持つ2つの中性ヘテロクムレンを合成しました。
  • 配位子のπアクセプター能（NHC vs. cAAC）により、クムレンの幾何構造（ベント型 vs. 直線型）を制御しました。
  • B2cat2、PhSeSePh、C6F5Brに対する反応性を示し、新しいホウ素誘導体を得ました。
  • B2ユニットで配位された安定な銅錯体を形成しました。

結論:

  • 調整可能な構造を持つ新しいホウ素クムレンの合成および特徴付けに成功しました。
  • クムレンの幾何構造に対する配位子の電子的特性の影響を確立しました。
  • 結合開裂および錯体形成におけるこれらの化合物の多様な反応性を示しました。
  • 配位化学における配位子としての潜在能力を強調しました。