Transcript Chemistry Revision - Trinity School Nottingham

Chemistry Revision
Session 8
Naming Alkenes
Name this alkene
 And what about (CH3)2CHCHCH2?

Isomerism

What type of
isomerism is this?

Why does it occur?
Mechanisms!
Explain how bromine reacts with ethene
(4 marks)
 Identify the mechanism type!

Polymers
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
Why does H2O have a higher boiling
point than H2S?
 Include a diagram in your answer for
water!!


What is the shape of H2S?
Test!

How can I differentiate between ethane
and hex-3-ene in the laboratory?
Sorry
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)

Definitions
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





Explain how each of the following will affect a
polymers strengthAdding 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 Polymers
Give 2 other ways I can increase the
strength of a polymer
 Again- boring though it may be- justify
your answer!

Manipulating polynmers
Cross-linking
 Increasing stereo-regularity

Alcohols

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
The polymer with the repeating unit
shown below dissolves well in water.
Why?

H OH

----C—C-----n
H
H
Final definitions
Define the terms: Elimination
 Electrophile
