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Chemistry Revision. Session 8. Name this alkene And what about (CH 3 ) 2 CHCHCH 2 ?. Naming Alkenes. What type of isomerism is this? Why does it occur?. Isomerism. Mechanisms!. Explain how bromine reacts with ethene (4 marks) Identify the mechanism type!. Polymers.

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naming alkenes
Name this alkene

And what about (CH3)2CHCHCH2?

Naming Alkenes
  • Explain how bromine reacts with ethene (4 marks)
  • Identify the mechanism type!
  • Draw a section of polymer chain to show the structure of poly(propene)
  • Draw a section of the polymer chain obtained from the monomer 1-chloroprop-1-ene!
  • Identify the intermolecular forces present in each polymer
  • Which would be more flexible? Why?
more on imf
More on IMF
  • Why does H2O have a higher boiling point than H2S?
  • Include a diagram in your answer for water!!
  • What is the shape of H2S?
  • How can I differentiate between ethane and hex-3-ene in the laboratory?
  • Couldn’t resist ONE trick question- in the lab ethene will be a gas, where as, of course, hex-3-ene is a liquid.
  • The more sensible question to ask is how to differentiate between hex-3-ene and hexane!
  • Add bromine water- which will be decolourised by hex-3-ene (orange  colourless)
  • Explain the difference between thermosetting and thermoplastic ploymers
  • What is a co-polymer
  • What is the difference between a crystalline and a amorphous region of a polymer
  • How will this affect its properties?
manipulating polymers
Manipulating polymers
  • Explain how each of the following will affect a polymers strength-
  • Adding a side group to the monomer- eg CH3
  • Increasing the chain length of the polymer
  • Substituting a Cl atom for an H atom in the monomer
  • Substituting that Cl for an amine group
manipulating polymers1
Manipulating Polymers
  • Give 2 other ways I can increase the strength of a polymer
  • Again- boring though it may be- justify your answer!
manipulating polynmers
Manipulating polynmers
  • Cross-linking
  • Increasing stereo-regularity
Which is/are secondary alcohols and which is/are tertiary alcohols?
  • Name the product if I oxidise-
  • Name the functional group
  • State the reagents and conditions
How would it be different if I oxidised ethanol using mild conditions?
  • And if I spent too long drinking coffee (surely not) and came back too late I would have made which compound?
dissolving polymers
Dissolving Polymers
  • The polymer with the repeating unit shown below dissolves well in water. Why?
  • H OH




final definitions
Final definitions
  • Define the terms:-
  • Elimination
  • Electrophile