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関連する概念動画

Types of Chemical Bonds02:37

Types of Chemical Bonds

Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O.
Covalent Bonding and Lewis Structures02:46

Covalent Bonding and Lewis Structures

Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.
Chemical Bonds02:40

Chemical Bonds


Atoms participate in a chemical bond formation to acquire a completed valence-shell electron configuration similar to that of the noble gas nearest to it in atomic number. Ionic, covalent, and metallic bonds are some of the important types of chemical bonds. Bond energy and bond length determine the strength of a chemical bond.
Types of Chemical Bonds
An ionic bond is formed due to electrostatic attraction between cations and anions. Often, the ions are formed by the transfer of electrons from...
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.
Types of Chemical Bonds02:37

Types of Chemical Bonds

Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O.
Introduction to Chemical Bonds01:01

Introduction to Chemical Bonds

Chemical Bonds
The electrons of the outermost energy level determine the energetic stability of the atom and its tendency to form chemical bonds with other atoms. The innermost electron shell has a maximum capacity of two electrons, but the next two electron shells can each have a maximum of eight electrons. This is known as the octet rule, which states that, with the exception of the innermost shell, atoms are most stable energetically when they have eight electrons in their valence shell, the...

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関連する実験動画

Updated: Jul 7, 2026

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
10:03

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Published on: September 30, 2014

化学的結合形成,結合破裂,および溶液中の電子移転.

E M Arnett, K Amarnath, N G Harvey

    Science (New York, N.Y.)
    |January 26, 1990
    PubMed
    まとめ

    本研究では,反応熱と再酸化潜在力を用いて有機化合物のヘテロリシスとホモリシスの熱を計算する方法を紹介しています. これは,結合エネルギーとイオン特性に関する新しいデータを提供します.

    科学分野:

    • 物理有機化学 物理有機化学
    • 熱化学は熱化学である.
    • コンピューティング・ケミストリー

    背景:

    • 結合解離エネルギーの理解は,有機化学において極めて重要です.
    • これらのエネルギーを決定するための既存の方法は,複雑または範囲が限られている可能性があります.

    研究 の 目的:

    • ヘテロリシス (DeltaH(het)) とホモリシス (DeltaH(homo)) の熱を計算するための新しい方法を開発する.
    • 様々な有機化合物のこれらの熱化学値の包括的なデータセットをまとめること.

    主な方法:

    • 溶液中の共振安定化カルベニウムイオンとカルバニオンに対する反応熱の決定.
    • レドックスポテンシャルから電子転送エネルギー (deltaG(ET)) を計算する.
    • 関連するDeltaH (ヘット),DeltaH (ホモ),およびDeltaG (ET) 値.

    主要な成果:

    • 反応熱からデルタH ((ヘット) を計算するための信頼性の高い方法が確立されました.
    • 電子伝送エネルギーを用いてDeltaH (ヘト) をDeltaH (ホモ) に変換することが達成されました.
    • 広範な有機化合物のシリーズについて,DeltaH (ヘト),DeltaH (ホモ),DeltaG (ET) の包括的な表記が作成されました.

    さらに関連する動画

    Solvent Bonding for Fabrication of PMMA and COP Microfluidic Devices
    04:54

    Solvent Bonding for Fabrication of PMMA and COP Microfluidic Devices

    Published on: January 17, 2017

    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

    関連する実験動画

    Last Updated: Jul 7, 2026

    The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
    10:03

    The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

    Published on: September 30, 2014

    Solvent Bonding for Fabrication of PMMA and COP Microfluidic Devices
    04:54

    Solvent Bonding for Fabrication of PMMA and COP Microfluidic Devices

    Published on: January 17, 2017

    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

    結論:

    • 開発された方法は,有機化合物の正確な熱化学データを提供します.
    • デルタH ((het),デルタH ((homo),およびデルタG ((ET) の相互関係は,イオンとラジカルの性質についての洞察を提供します.
    • この研究は,有機系における化学結合と反応性の理解を拡大する.