liquid ions and boron nitride
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Liquid Ions and Boron Nitride. Hexagonal. Cubic. Importance of AlCl3. AlCl 3 is in a dynamic equilibrium with Al 2 Cl 6 Al 2 Cl 6  2AlCl 3 It has a high affinity for chlorine This allows it to act a catalyst in the Friedel-Crafts reaction, in this case for the chlorination of benzene.

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importance of alcl3
Importance of AlCl3
  • AlCl3 is in a dynamic equilibrium with Al2Cl6
  • Al2Cl6 2AlCl3
  • It has a high affinity for chlorine
  • This allows it to act a catalyst in the Friedel-Crafts reaction, in this case for the chlorination of benzene.
ionic liquids
Ionic Liquids
  • Ions in a liquid state
  • Term particularly applied to those liquid at room temperature (RTILs)
  • Due to crystal-coordination structure (thus weak lattice)
  • These are rarely natural and are often synthesised to meet a specific need
  • They act as good solvents
  • Some very common ones have AlCl4- present as the anion
importance of rtils today
Importance of RTILs today
  • Vital role in green chemistry
  • Cleaner
  • Replaced Volatile Organic Compounds (VOCs) for the following reasons:
    • VOCs evaporate easily, but RTILs don’t
    • Products in RTIL solutions are easier to remove
    • Catalysts in RTIL solutions are easier to recover
boron nitride bn
Boron Nitride (BN)
  • Giant covalent molecule.
  • Exist in two forms:
  • H-boron nitride,
  • C-boron nitride.
h boron nitride
H-Boron Nitride
  • Often referred to as “white graphite”;
  • lubricious material;
  • semi-conductor;
  • very high thermal conductivity;
  • good thermal shock resistance;
  • chemically unreactive but oxidises at 850°C .
c boron nitride
C-Boron Nitride
  • Second hardest material known;
  • wear resistant;
  • high thermal conductivity;
  • chemically inert;
  • can be used as a catalyst.
slide8
Uses
  • It is a good lubricant at both low and high temperatures;
  • cosmetic products;
  • widely used as an abrasive.
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