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Updated: Jun 23, 2025

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Published on: March 24, 2018

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工程 ππ 相互作用有利于超分子二元 X@[FeL3]2 (X = Cl, Br, I):固态和溶液结构

Arnau Risa1, Leoní A Barrios1,2, Rosa Diego1,2

  • 1Departament de Química Inorgànica i Orgànica, Secció Química Inorgànica, Universitat de Barcelona Barcelona Spain leoni.barrios@ub.edu novikov@ub.edu aromi@ub.edu.

Chemical science
|June 21, 2024
PubMed
概括

新的bis-pyrazolylquinoline配体可以创建稳定的三方铁组件. 这些超分子复合物保留化物客人如化物和化物,但释放化物,显示独特的溶液行为.

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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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Hybridization of Atomic Orbitals II03:35

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sp3d and sp3d 2 Hybridization
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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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The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
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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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¹H NMR: Complex Splitting01:13

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A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
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