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関連する概念動画

Carbon Skeletons01:12

Carbon Skeletons

Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side chains...
States of Water01:23

States of Water

Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart.
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
Intermolecular Forces and Physical Properties02:56

Intermolecular Forces and Physical Properties

π Molecular Orbitals of 1,3-Butadiene01:24

π Molecular Orbitals of 1,3-Butadiene

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...
A Single-Component System01:24

A Single-Component System

In the field of chemistry, the terms "component" and "phase" hold significant importance. A component refers to a chemically distinct substance in a system that has specific properties. It is chemically homogeneous, meaning it has the same properties throughout. For example, in a mixture of salt and water, both salt and water are considered separate components because they have different chemical properties.On the other hand, a phase is a form of matter that has a consistent chemical...
Phase Diagrams of Ternary Systems01:28

Phase Diagrams of Ternary Systems

Consider a ternary system, which is composed of three components: water (W), ethanoic acid (E), and trichloromethane (T). Here, Ethanoic acid (E) is fully miscible with both water (W) and trichloromethane (T), meaning it can mix entirely with either of them. However, water and trichloromethane have partial miscibility, meaning they can only mix to a certain extent, beyond which two separate phases will form.The phase diagram of a ternary system is represented as an equilateral triangle, where...

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関連する実験動画

Updated: Jun 25, 2026

Chemical Analysis of Water-accommodated Fractions of Crude Oil Spills Using TIMS-FT-ICR MS
08:17

Chemical Analysis of Water-accommodated Fractions of Crude Oil Spills Using TIMS-FT-ICR MS

Published on: March 3, 2017

デヒドロフェニルニトレン:四重体対二重体状態

Holger F Bettinger1, Wolfram Sander

  • 1Lehrstuhl für Organische Chemie II, Ruhr-Universität Bochum, Universitätsstrasse 150, 44780 Bochum, Germany. holger.bettinger@ruhr-uni-bochum.de

Journal of the American Chemical Society
|August 9, 2003
PubMed
まとめ

この研究では,4-デヒドロフェニルニトロンの二重状態が最も安定した同位体であることを明らかにしています. 計算方法により,様々なデヒドロフェニルニトロンの同位体における電子構造とエネルギーを正確に決定した.

科学分野:

  • コンピューティング・ケミストリー
  • 量子化学とは,量子化学である.
  • 有機化学 オーガニック・ケミストリー

背景:

  • デヒドロフェニルニートレンは,複雑な電子構造を持つ反応性中間物質である.
  • その安定性と電子状態を理解することは,その反応性を予測するのに極めて重要です.

研究 の 目的:

  • 4-,3-,および2-デヒドロフェニルニートレンの幾何学とエネルギーの調査.
  • これらの化合物の中で最も安定した電子状態と同位体を決定する.

主な方法:

  • 完全なアクティブスペース自己一貫性フィールド (CASSCF),多構成準退化二次波動 (MCQDPT),および内部的に契約された多構成-参照構成相互作用 (MRCI) 理論を利用した.
  • 高精度計算のための相関一貫性トリプルゼータベースセットを使用した.

主要な成果:

  • 4-デヒドロフェニルニトレン (3) のクォーテット基底状態 ((4) A (((2)) を特定した.
  • 3-デヒドロフェニルナイトレンの様々な電子状態に対するアディアバティック刺激エネルギーを計算した.
  • 4-デヒドロフェニルニトレン ((2) A'') のダブレット状態が最も安定した同位体であり,3.5 kcal mol (((-1) のクォーテート状態である3.3 kcal mol (((-1) よりも低いことが判定されました.

さらに関連する動画

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
10:28

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Published on: May 27, 2018

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
12:11

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry

Published on: April 8, 2020

関連する実験動画

Last Updated: Jun 25, 2026

Chemical Analysis of Water-accommodated Fractions of Crude Oil Spills Using TIMS-FT-ICR MS
08:17

Chemical Analysis of Water-accommodated Fractions of Crude Oil Spills Using TIMS-FT-ICR MS

Published on: March 3, 2017

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
10:28

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Published on: May 27, 2018

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
12:11

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry

Published on: April 8, 2020

結論:

  • 4-デヒドロフェニルニトレンの二重状態は,最も安定した同位体である.
  • 計算方法により,デヒドロフェニルニートレンの電子構造と安定性に関する正確な洞察が得られます.
  • この発見は,窒素化学のより深い理解に貢献します.