Carbon Structures
- 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
- Very high MP, very hard
- 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.
- Transparent Sunscreen Creanms
- Diamond
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