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Related Concept Videos

MO Theory and Covalent Bonding02:40

MO Theory and Covalent Bonding

The molecular orbital theory describes the distribution of electrons in molecules in a manner similar to the distribution of electrons in atomic orbitals. The region of space in which a valence electron in a molecule is likely to be found is called a molecular orbital. Mathematically, the linear combination of atomic orbitals (LCAO) generates molecular orbitals. Combinations of in-phase atomic orbital wave functions result in regions with a high probability of electron density, while...
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...
Solution Equilibrium and Saturation01:59

Solution Equilibrium and Saturation

Imagine adding a small amount of sugar to a glass of water, stirring until all the sugar has dissolved, and then adding a bit more. You can repeat this process until the sugar concentration of the solution reaches its natural limit, a limit determined primarily by the relative strengths of the solute-solute, solute-solvent, and solvent-solvent attractive forces. You can be certain that you have reached this limit because, no matter how long you stir the solution, undissolved sugar remains. The...
Chemical Stoichiometry and Gases: Using Ideal Gas Law to Determine Moles03:12

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Chemical stoichiometry describes the quantitative relationships between reactants and products in chemical reactions.
Elements: Chemical Symbols and Isotopes02:31

Elements: Chemical Symbols and Isotopes

A chemical symbol is an abbreviation used to indicate an element or an atom of an element. For example, the symbol for mercury is Hg. The same symbol is used to indicate one atom of mercury (microscopic domain) or to label a container of many atoms of the element mercury (macroscopic domain).
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Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

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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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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

[Henri Moissan, a prestigious chemist].

J Flahaut1

  • 1jg.stoliaroff-p@orange.fr

Annales Pharmaceutiques Francaises
|April 26, 2008
PubMed
Summary
This summary is machine-generated.

Henri Moissan pioneered inorganic chemistry, isolating fluorine and developing artificial diamond synthesis. His work involved high temperatures up to 3000°C and high pressures, earning him the Nobel Prize.

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Area of Science:

  • Inorganic chemistry
  • Materials science
  • High-pressure physics

Background:

  • Henri Moissan's significant contributions to inorganic chemistry.
  • The isolation and subsequent developments of fluorine.
  • Pioneering research into artificial diamond production.

Discussion:

  • Utilized simultaneous high pressures and high temperatures for diamond synthesis.
  • Employed arc electric furnaces capable of reaching 3000°C.
  • Achieved high pressures through rapid cooling of molten iron-carbon alloys.

Key Insights:

  • Successful synthesis of artificial diamonds.
  • Advancements in fluorine chemistry.
  • Development of novel high-temperature and high-pressure techniques.

Outlook:

  • Laid groundwork for future synthetic diamond applications.
  • Inspired further research in extreme condition materials science.
  • Established new methodologies in inorganic synthesis.