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Molecular Shape and Polarity03:37

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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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Hydrogen Bonds

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A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
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Hydrogen Bonds

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Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
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sp3d and sp3d 2 Hybridization
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The process of a solid dissolving in a liquid to form a solution is governed by the solubility limit, which is the maximum amount of the solid substance, or solute, that can be dissolved in a specific volume of the liquid or solvent. As the solute dissolves, it reaches a point where no more solute can be dissolved at a given temperature - this is known as the saturation point. However, if further solute is added and it manages to dissolve, the solution becomes supersaturated. Supersaturated...
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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面向分子识别:在固态和溶液中的三点素结合.

Stefan H Jungbauer1, David Bulfield, Florian Kniep

  • 1Fakultät für Chemie und Biochemie, Ruhr-Universität Bochum , Universitätsstraße 150, 44801 Bochum, Germany.

Journal of the American Chemical Society
|November 20, 2014
PubMed
概括

这项研究引入了一种强大的三点素结合相互作用,与单交互相比,显示出明显增强的结合亲和力. 这一进步突出了素结合的突出特点.

科学领域:

  • 超分子化学 超分子化学
  • 化学晶体学 化学晶体学
  • 有机化学 有机化学

背景情况:

  • 素结合是一种非共价相互作用,涉及素原子作为易斯酸.
  • 多点相互作用对于分子识别和复杂的超分子结构的形成至关重要.
  • 之前的研究已经探索过素结合,但优化多点相互作用以增强结合亲和力仍然是研究的一个活跃领域.

研究的目的:

  • 设计和描述一个明确的三点素结合相互作用.
  • 为了研究几何互补对素键强度的影响.
  • 评估这种相互作用在分子识别中的溶液相应用中的潜力.

主要方法:

  • 对素键捐赠体和胺接受体的X射线结构分析.
  • 定位实验用于确定约束常数.
  • 对具有不同程度的几何合适度的结合亲和关系进行比较分析.

主要成果:

  • 在三酸键捐赠者和选定的三胺之间证明了理想的几何匹配.
  • 观察到的结合常数大约是比同类单胺氨基的三倍.
  • 与较少的几何互补的多胺氨基一起表现出明显较弱的结合.

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结论:

  • 已经建立了一个高效的三点素结合相互作用.
  • 在多点素结合中,几何互补性对于最大化结合亲和度至关重要.
  • 这一原理有望推进素结合在溶液相分子识别中的应用.