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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Liquid Ions and Boron Nitride

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Liquid ions and boron nitride

Liquid Ions and Boron Nitride

Hexagonal

Cubic


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.


Liquid ions and boron nitride

Uses

  • It is a good lubricant at both low and high temperatures;

  • cosmetic products;

  • widely used as an abrasive.


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