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Noble Gases02:54

Noble Gases


The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false.
The Equilibrium Constant03:10

The Equilibrium Constant

Consider the oxidation of sulfur dioxide:
Molecular Structure and Acidity02:34

Molecular Structure and Acidity

An acid can be deprotonated to form a conjugate base or an anion. If the produced anion is more stable, then the acid is stronger. On the contrary, if the anion is unstable, then the acid is weaker. Hence, to determine the acidity of the compound, the stability of its conjugate base is studied using various factors.
The size effect explains the change in atomic size on acidity. When comparing the acids formed from elements that belong to the same column in the periodic table, their atomic sizes...
Structure and Physical Properties of Alkynes02:37

Structure and Physical Properties of Alkynes

Introduction:
In nature, compounds containing both carbon and hydrogen are known as "hydrocarbons". Aliphatic hydrocarbons are compounds whose molecules contain saturated single bonds (i.e., alkanes) or unsaturated double or triple bonds. Alkenes contain carbon–carbon double bonds and have a structural formula CnH2n. Unsaturated hydrocarbons containing carbon–carbon triple bonds are called "alkynes" and are structurally represented by the formula CnH2n-2.
The simplest alkyne is ethyne, or...
Acidity of 1-Alkynes02:42

Acidity of 1-Alkynes


The acidic strength of hydrocarbons follows the order: Alkynes > Alkenes > Alkanes. The strength of an acid is commonly expressed in units of pKa — the lower the pKa, the stronger the acid. Among the hydrocarbons, terminal alkynes have lower pKa values and are, therefore, more acidic. For example, the pKa values for ethane, ethene, and acetylene are 51, 44, and 25, respectively, as shown here.
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...

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Updated: Jul 14, 2026

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
08:49

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films

Published on: December 4, 2014

安定したアルゴン化合物.

Khriachtchev1, Pettersson, Runeberg

  • 1Department of Chemistry, University of Helsinki, Finland.

Nature
|September 6, 2000
PubMed
まとめ

科学者たちは,アルゴンの最初の安定した化合物であるアルゴンフッ素水化物 (HArF) を合成しました. この画期的な発見は,より軽い高貴ガスでさえも化合物を形成し,化学的可能性を広げることができるという予測を裏付けている.

科学分野:

  • 無機化学 無機化学とは
  • 物理化学 物理化学
  • 量子化学とは,量子化学である.

背景:

  • 伝統的に惰性と考えられている高貴気体は,クセノンやクリプトンなどの重元素との反応性を示し,化合物を形成しています.
  • 軽い高貴ガス (ネオン,ヘリウム,アルゴン) は,既知の安定化合物を持たない最後のもので,化学研究における課題となった.

研究 の 目的:

  • より軽い貴気体で安定した化合物を形成する可能性を調査する.
  • アルゴンの安定化合物を合成し,特徴づけること.

主な方法:

  • 固体アルゴンマトリックスにおけるフッ化水素の光分解.
  • 赤外線光譜を用いたアルゴンフッ素水化物 (HArF) の特定. 赤外線光譜を用いたアルゴンフッ素水化物の識別.
  • 同位体置換による振動帯のシフトの分析.
  • 広範なアビニチオ計算計算.

主要な成果:

  • アルゴン・フッ素水化物 (HArF) の合成と識別が成功しました.
  • 顕微鏡検査で,HArF.の形成が確認されました.
  • 計算による研究では,イオン結合とコバルント結合の貢献により,固有の安定性を示した.

さらに関連する動画

Synthesis and Mass Spectrometry Analysis of Oligo-peptoids
11:44

Synthesis and Mass Spectrometry Analysis of Oligo-peptoids

Published on: February 21, 2018

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy
07:49

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy

Published on: February 20, 2020

関連する実験動画

Last Updated: Jul 14, 2026

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
08:49

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films

Published on: December 4, 2014

Synthesis and Mass Spectrometry Analysis of Oligo-peptoids
11:44

Synthesis and Mass Spectrometry Analysis of Oligo-peptoids

Published on: February 21, 2018

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy
07:49

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy

Published on: February 20, 2020

結論:

  • アルゴンフッ素水化物 (HArF) は,安定した化合物であり,高貴ガス化学における重要な進歩を示しています.
  • この発見は,より軽い貴気体の安定した水化物種の理論的予測を裏付けている.
  • これは,以前は反応しない元素の化学を研究するための新しい道を開きます.