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

Hydroboration-Oxidation of Alkenes03:08

Hydroboration-Oxidation of Alkenes

12.7K
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.
12.7K
Regioselectivity and Stereochemistry of Hydroboration02:36

Regioselectivity and Stereochemistry of Hydroboration

9.8K
A significant aspect of hydroboration–oxidation is the regio- and stereochemical outcome of the reaction.
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
9.8K
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation02:47

Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation

22.1K
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.
22.1K
Exceptions to the Octet Rule02:55

Exceptions to the Octet Rule

39.2K
Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
39.2K
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

4.0K
Electrophilic addition of halogens to alkenes proceeds via a cyclic halonium ion to form a 1,2-dihalide or a vicinal dihalide.
4.0K
Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride01:26

Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride

2.4K
Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
2.4K

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

Retinal hyper-reflective foci link retinal and cortical pathology in paediatric multiple sclerosis.

Brain : a journal of neurology·2026
Same author

Guidance for the Diagnosis and Treatment of Rare Embryonal and Sarcomatous Brain Tumors-a Report from the Central Nervous System-International Registry for Rare Embryonal and Sarcomatous Tumors German Society of Pediatric Oncology and Hematology Study Group.

Klinische Padiatrie·2026
Same author

Genetic and Congenital Cytomegalovirus-Related Hearing Loss in Children: Volumetric MRI Analysis of Auditory and Visual Cortices.

AJNR. American journal of neuroradiology·2026
Same author

Something germane about germanium: facile access to Ge<sub>10</sub> adamantane.

Chemical communications (Cambridge, England)·2026
Same author

Polarity on Demand: Nucleophilic, Electrophilic, and Ambiphilic Reactivity at a 9,10-Dihydro-9,10-Disilaanthracene Platform.

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

Bimodal Q-band probehead with improved signal-to-noise ratio in pulse electron paramagnetic resonance.

Magnetic resonance (Gottingen, Germany)·2026

関連する実験動画

Updated: Apr 16, 2026

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

8.5K

前編成のディトピクボランは,高効率の1電子または2電子トラップとして使用されます.

Alexander Hübner1, Thomas Kaese1, Martin Diefenbach1

  • 1†Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany.

Journal of the American Chemical Society
|February 28, 2015
PubMed
まとめ

研究者らは, bis ((9-borafluorenyl) メタンから赤いダイアニオン塩と濃緑のモノアニオン基を合成した. これらの研究は,分光学と結晶学によって確認された,モノアニオン基とダイアニオンにおける直接のB-B結合相互作用を明らかにしています.

さらに関連する動画

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

15.6K
Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps
13:21

Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps

Published on: August 18, 2012

19.7K

関連する実験動画

Last Updated: Apr 16, 2026

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

8.5K
Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

15.6K
Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps
13:21

Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps

Published on: August 18, 2012

19.7K

科学分野:

  • オルガノボロン化学 オルガノボロン化学
  • 超分子化学 超分子化学
  • 顕微鏡学と結晶学

背景:

  • ビス ((9-ボラフッロレニル) メタンは,新しいボロンを含む化合物の前駆体として機能します.
  • 要素同士の結合を理解することは,新しい材料や反応経路の開発に不可欠です.

研究 の 目的:

  • bis ((9-borafluorenyl) メタンのダイアニオンとモノアニオン基を合成し,特徴づけること.
  • これらの減少種におけるボロン-ボロン相互作用の性質を調査する.
  • 陽子とダイアニオンの反応性を調べるために.

主な方法:

  • リチウム金属を用いた化学的還元.
  • コンプロポレーション・リアクション.
  • 電子パラマグネティック共振 (EPR) スペクトロスコーピー.
  • X線結晶学.X線結晶学.X線結晶学.
  • 核磁共振 (NMR) スペクトロスコーピー. 核磁共振 (NMR) スペクトロスコーピー. 核磁共振 (NMR) スペクトロスコーピー. 核磁共振 (NMR) スペクトロスコーピー.
  • 量子化学的な計算.

主要な成果:

  • 赤色ダイアニオン塩Li2[1]と濃緑色モノアニオンラジカルLi[1]の合成.
  • EPRスペクトロスコーピーは,ボロンと陽子との超微細結合を確認し,ペアレス電子の局所性を示した.
  • X線結晶学では,減少するB··B距離 (2.534(2) Åから1.906(3) Å) を発見し,縮小が増加した.
  • Li2のプロトネーション[1]により,B-H-B2電子3中心結合を持つ周期性ボロヒドリドが得られました.
  • 計算分析により,減少種における局所的なB-B相互作用が示された.

結論:

  • 直接的なB-B1電子と2電子の結合相互作用は,それぞれモノアニオン基とダイアニオンで確立されています.
  • ボロンの原子は核愛性の性質を示し,B-B結合のプロトン化などの反応を可能にします.
  • この研究は,減少したオルガノボロン系における結合に関する重要な洞察を提供します.