Carbon Structures

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  • Created by: Jasmin
  • Created on: 10-01-14 11:41
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  • Carbon Structures
    • Diamond
      • C forms 4 identical bonds - tetrahedral
      • Strong covalently bonded with sigma bonds
        • Very high MP, very hard
          • Good thermal conductor, vibrations travel easily through the lattice, can't conduct electricity, won't dissolve in any solvent
      • Silicon structure is similar to diamond
    • Graphite
      • C atoms in layers
      • C bonded to 3 other carbons
      • 120 degrees
      • Layers weakly bonded to each other
        • Easily broken, sheets, can slide, slippary. Less dense than diamond because layers are quite far apart- strong, lightw sports equipment
      • Fourth outer electron from each C atom is delocalised and free to move - good electrical conductor - electric current can flow
      • Strong covalent, very high MP, insoluble
    • Fullerenes
      • 32 or more C atoms
      • Buckministerfullerene C60 has 60
      • Each C bonded to 3 other carbon atoms --> ball shaped
      • 4th outer shell electron is delocalised but it cannot move between molecules - does not conduct electricity
      • Soluble most of them in organic solvents and form brightly coloured solutions
      • Hollow - can be used to 'cage' other molecules. Used as a way of delivering a drug into specific cells of the body
    • Nanotubes
      • Very small, if embedded into polymers they may produce materials with good electrical conductivity and strength
      • Very strong - covalent bonds, conduct electricity
    • Nanotechnology
      • Could improve peoples health and save lives / QofL
      • New products and technologies are thoroughly tested to make sure not harmful
      • Example
        • Transparent Sunscreen Creanms
          • Sun screen may pass through skin and so damage the cells. But some think that they do not affect the skin.

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