1 / 8

Liquid Ions and Boron Nitride

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.

lana
Download Presentation

Liquid Ions and Boron Nitride

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Liquid Ions and Boron Nitride Hexagonal Cubic

  2. 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.

  3. 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

  4. 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

  5. Boron Nitride (BN) • Giant covalent molecule. • Exist in two forms: • H-boron nitride, • C-boron nitride.

  6. 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 .

  7. C-Boron Nitride • Second hardest material known; • wear resistant; • high thermal conductivity; • chemically inert; • can be used as a catalyst.

  8. Uses • It is a good lubricant at both low and high temperatures; • cosmetic products; • widely used as an abrasive.

More Related