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関連する概念動画

Predicting Molecular Geometry02:27

Predicting Molecular Geometry

VSEPR Theory for Determination of Electron Pair Geometries
Valence Bond Theory02:42

Valence Bond Theory

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...
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

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,...
Coordination Number and Geometry02:57

Coordination Number and Geometry

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.
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...

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関連する実験動画

Updated: May 7, 2026

Preparation and Evaluation of 99mTc-labeled Tridentate Chelates for Pre-targeting Using Bioorthogonal Chemistry
10:54

Preparation and Evaluation of 99mTc-labeled Tridentate Chelates for Pre-targeting Using Bioorthogonal Chemistry

Published on: February 4, 2017

β-テクネチウム二塩化物:固体調節構造,電子構造,物理特性

Christos D Malliakas1, Frederic Poineau, Erik V Johnstone

  • 1Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.

Journal of the American Chemical Society
|September 24, 2013
PubMed
まとめ
この要約は機械生成です。

新しいテクネチウム二塩化物ポリモルフ β-TcCl2 が合成され,特徴づけられました. このp型半導体は,独特の鎖構造と二磁性特性を備えており,帯域間隔が0.12 eVと決定されています.

さらに関連する動画

Investigations on the Ga(III) Complex of EOB-DTPA and Its 68Ga Radiolabeled Analogue
11:22

Investigations on the Ga(III) Complex of EOB-DTPA and Its 68Ga Radiolabeled Analogue

Published on: August 17, 2016

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
10:42

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

Published on: December 29, 2016

関連する実験動画

Last Updated: May 7, 2026

Preparation and Evaluation of 99mTc-labeled Tridentate Chelates for Pre-targeting Using Bioorthogonal Chemistry
10:54

Preparation and Evaluation of 99mTc-labeled Tridentate Chelates for Pre-targeting Using Bioorthogonal Chemistry

Published on: February 4, 2017

Investigations on the Ga(III) Complex of EOB-DTPA and Its 68Ga Radiolabeled Analogue
11:22

Investigations on the Ga(III) Complex of EOB-DTPA and Its 68Ga Radiolabeled Analogue

Published on: August 17, 2016

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
10:42

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

Published on: December 29, 2016

科学分野:

  • 固体化学 固体化学
  • 無機材料科学とは,無機材料科学である.
  • 材料の特徴付けについて

背景:

  • テクネチウム二塩化物 (TcCl2) は複数の形態で存在し,その性質に影響を与えます.
  • ポリモルフの理解は,材料の開発と応用において極めて重要です.

研究 の 目的:

  • テクネチウム二塩化物の新しいポリモルフ β-TcCl2.2 を合成し,特徴づけること.
  • β-TcCl2.2の結晶構造と物理的性質を調査する.
  • 理論的計算を用いて,TcCl2の潜在的安定形態を探求する.

主な方法:

  • 450°Cの密閉管内のTc金属と塩素の反応によるβ-TcCl2の合成.
  • 結晶学的構造の決定.
  • 物理的性質の測定は,抵抗力,シーベック効果,磁気感受性,反射スペクトロスコーピーを含む.
  • 密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.

主要な成果:

  • 新しいテクネチウム二塩化物ポリモルフ β-TcCl2.2 の合成に成功しました.
  • オーダーされたTcTcベクトルを持つ顔を共有する[Tc2Cl8]ユニットの無限連鎖として結晶構造の解明.
  • β-TcCl2は,帯域ギャップ0.12(2) eVのp型半導体として識別されました.
  • 磁気感受性の測定は,ダイアマグネティックな行動を示した.

結論:

  • 新規のβ-TcCl2ポリモルフは,ユニークな調節構造を有しています.
  • β-TcCl2は,電子アプリケーションに関連する半導体特性を示しています.
  • 理論的な計算により,他の潜在的に安定したTcCl2形態についての洞察が得られる.