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相关概念视频

Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

41.7K
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,...
41.7K
Valence Bond Theory02:42

Valence Bond Theory

8.5K
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...
8.5K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

26.2K
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...
26.2K
Metallic Solids02:37

Metallic Solids

18.3K
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....
18.3K
Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

31.9K
sp3d and sp3d 2 Hybridization
31.9K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.2K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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相关实验视频

Updated: Jun 11, 2025

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
06:35

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates

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八面体与像蒂亚拉的Pd6(SR)12 集群

Chenhao Ruan1,2, Changqing Meng1,2, Kunpeng Wang3

  • 1Strait Laboratory of Flexible Electronics, Fujian Key Laboratory of Flexible Electronics, Strait Institute of Flexible Electronics, Fujian Normal University, Fuzhou 350117, China.

Nano letters
|October 4, 2024
PubMed
概括

研究人员合成了第一个非tiara-like-thiolate集群,Pd6-Oct. 这一发现有助于我们更好地理解这些重要的催化材料中的结构性质关系.

关键词:
具有催化特性,具有催化特性.几何和电子结构的几何和电子结构.宿主-客人的化学反应金属集群的金属集群.八面体的 Pd6 (((SR) 12 八面体结构 - 属性关系.

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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV

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Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
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Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films

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相关实验视频

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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
06:35

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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV

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Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
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Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films

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科学领域:

  • 材料科学 材料科学 材料科学
  • 无机化学 无机化学
  • 纳米技术 纳米技术

背景情况:

  • 原子精确的-酸硫酸盐集群以已定义的结构和催化,传感器和生物医学中的应用而闻名.
  • 现有的分子结构通常表现出类似皇冠的布置.

研究的目的:

  • 报告了第一次合成和表征非tiara类的酸-thiolate集群.
  • 通过比较新型集群与已知的像皇冠的类似物来研究结构-属性关系.

主要方法:

  • 电子喷雾电离质谱仪 (ESI-MS) 用于组合.
  • 单晶X射线衍射 (SXRD) 用于几何结构.
  • 紫外对红外吸收光谱学和电子结构的量子化学计算.

主要成果:

  • 新的八面体Pd6(SC6H11)12 (Pd6-Oct) 星团被合成并进行结构性特征.
  • 尽管Pd6-Oct具有相似的化学成分,但与像Pd6 ((SC2H4Ph) 12 (Pd6-Tia) 相比,它具有不同的几何结构.
  • 电子结构,兴奋状态动态,宿主-客人化学和催化性质进行了比较.

结论:

  • 这项工作在 - 硫酸盐集群的合成中取得了重大进展.
  • 这项研究加深了对几何结构如何影响这些星团属性的理解.