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関連する概念動画

Hydrogen Bonds01:04

Hydrogen Bonds

A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
Hydrogen Bonds00:26

Hydrogen Bonds

Hydrogen BondsHydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.Hydrogen Bonds Control the World!Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are...
Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

sp3d and sp3d 2 Hybridization
Aldehydes and Ketones with Water: Hydrate Formation01:20

Aldehydes and Ketones with Water: Hydrate Formation

An oxygen-based nucleophile, like water, can undergo addition reactions with aldehydes and ketones. The reaction leads to the formation of hydrates, also referred to as 1,1-diols or geminal diols.
The formation of hydrates is a reversible reaction. Hydrate formation is influenced by steric and electronic factors accompanying the alkyl substituents on the carbonyl group: The rate of hydrate formation increases with a decrease in the number of alkyl groups attached to the carbonyl carbon. Hence,...
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
Radical Formation: Homolysis00:54

Radical Formation: Homolysis

A bond is formed between two atoms by sharing two electrons. When this bond is broken by supplying sufficient energy, either two electrons can be taken up by one atom forming ions by the cleavage called heterolysis, or the two electrons are shared by two atoms, with one each creating radicals by the cleavage called homolysis.

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関連する実験動画

Updated: Jul 11, 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

シン-ヒドロキシエポキシドにおける内部水素結合形成

J P Glusker, D E Zacharias, D L Whalen

    Science (New York, N.Y.)
    |February 5, 1982
    PubMed
    まとめ

    この研究は,潜在的に発がん性の中間物質であるシンダイオールエポキシドの内部水素結合を確認した. この結合は水溶液で安定し,分子構造に影響を与えます.

    科学分野:

    • 有機化学 オーガニック・ケミストリー
    • 構造化学についてです.
    • 化学カルチノゲネシスによる化学カルチノゲネシス

    背景:

    • ポリサイクル芳香炭化水素 (PAH) は環境汚染物質である.
    • PAHの代謝は,ダイオールエポキシドを生成し,そのうちのいくつかは発がん性である.
    • ディオールエポキシドのシンおよびアンチ同位体は,異なる生物学的活性を示します.

    研究 の 目的:

    • シンドイオルエポキシドの構造特性を調査する.
    • このシンダイオルエポキシドにおける内部水素結合の存在と安定性を決定する.
    • シンとアンチダイオルエポキシドの構造特性を比較する.

    主な方法:

    • 固体構造を決定するために,X線結晶学を用いた.
    • 溶液中の化合物を研究するために,核磁気共振 (NMR) スペクトロスコーピーを用いた.
    • ダイオキサンと水の混合物での溶解性の研究が行われました.

    主要な成果:

    • 3,4-エポキシ-2-メチル-1,2,3,4-テトラヒドロ-1-ナフトールで内部水素結合の存在が確認されました.
    • この水素結合は,最大80モル%の水の水溶液で安定していることが判明しました.

    さらに関連する動画

    From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
    06:44

    From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

    Published on: March 24, 2018

    Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
    12:27

    Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes

    Published on: September 8, 2013

    関連する実験動画

    Last Updated: Jul 11, 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

    From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
    06:44

    From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

    Published on: March 24, 2018

    Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
    12:27

    Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes

    Published on: September 8, 2013

  • シンダイオルエポキシドは,ヒドロキシルおよびメチル群の軸位置を示し,反同位体における赤道位置と対照的に見られた.

    • 結論:

    • 内部水素結合は,シンダイオールエポキシドの構成に重要な役割を果たします.
    • この結合の存在は,化合物の反応性と生物学的活性に影響を与える可能性があります.
    • シン・エポキシドとアンチ・ダイオル・エポキシドの構造的な違いは重要で,さらなる調査が必要である.