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関連する概念動画

Valence Bond Theory02:42

Valence Bond Theory

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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

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Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
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Predicting Molecular Geometry02:27

Predicting Molecular Geometry

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π Molecular Orbitals of the Allyl Cation and Anion

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An allyl group is a three-carbon conjugated system where the sp³-hybridized allylic carbon is bonded to a CH=CH2 group via a single bond. Allyl anions can be obtained by treating propene with a strong base that can deprotonate methyl groups. Allyl cations are formed as intermediates during substitution reactions involving allylic halides. In both cases, the hybridization of the allylic carbon changes from sp3 to sp2, giving rise to a carbon chain with three sp2-hybridized carbons, each with...
4.8K
Coordination Number and Geometry02:57

Coordination Number and Geometry

17.2K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
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VSEPR Theory and the Effect of Lone Pairs04:01

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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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アニオン制御オリゴメリゼーションによる高度に絡み合った (M3L2) 8のアニオン制御オリゴメリゼーションによる高度に絡み合った (M3L2のアニオン制御オリゴメリゼーションによる

Yuya Domoto1, Masahiro Abe1, Makoto Fujita1,2

  • 1Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.

Journal of the American Chemical Society
|June 8, 2021
PubMed
まとめ
この要約は機械生成です。

研究者はアセチレン調整を用いて 複雑なナノ構造である (M3L2) 8の断片化された立方体を作りました この複雑なフレームワークは,新しい分子絡み合いのプロセスを通して自己組み立てられ,ナノ材料の構築に新しい可能性を提供します.

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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
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X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050
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X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050

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X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050
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X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050

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科学分野:

  • 協調化学
  • 超分子化学
  • ナノ材料科学

背景:

  • アセチレンπ調整と金属ヘテロ原子調整は複雑なナノ構造の鍵となる.
  • M3L2サブユニットのオリゴメリゼーションは,オーダーされたナノ材料への経路を提供します.

研究 の 目的:

  • 新しい (M3L2) 8の断片化された立方体ナノ構造の形成を報告する.
  • この複雑なフレームワークの自己組み立てメカニズムと構造的特徴を明らかにする.

主な方法:

  • M3L2サブユニットの自己組み立て
  • オリゴメリゼーションを誘発するために,対アニオン交換 (BF4- to NO3-).
  • シングル・クリスタル・X線微分分析

主要な成果:

  • M3L2サブユニットオリゴメリゼーションによる (M3L2) 8断片立方体の形成.
  • このフレームワークは,π-調整を支える,高度に絡み合った構造を示しています.
  • 多面体ケージ (n=2,4,6,8) のシリーズは,新しいタイプの分子絡みとして特徴付けられました.

結論:

  • (M3L2) 8の断片化された立方体は,アセチレンπ調整を含むユニークなプロセスを通して自己組み立てます.
  • この研究は,三角形のモチーフに基づいた新しい分子絡まりを明らかにしています.
  • 多面体ケージの選択的合成は,自己組み立て条件を調節することによって達成できます.