Alkenes Flashcards
1
Q
General formula
A
CnH2n
2
Q
Why do alkenes get attacked by electrophiles?
A
2 pairs e- in C=C so high e- density
3
Q
What is the test for unsaturation?
A
- Bromine water
- Orange to colourles
4
Q
What happens when you add to an unsymmetrical alkene?
A
- Forms major product
- Tertiary carbocation
- More stable
5
Q
What happens when you add plasticisers to polymers?
A
- Makes it more flexible
- Plasticier molecule get btw polymer chains + pushes them apart
- Reduces strength of IMF so slide more making polymer bend
6
Q
Strong and rigid polyalkenes tend to have ____ + _____ chains
A
Long + straight
7
Q
Weaker + flexible polyalkenes tend to have ____ + _____ chains
A
Short + branched
8
Q
Which monomer is PVC formed from?
A
Chloroethene
9
Q
What are rigid PVC used for?
A
Drainpipes + window frames
10
Q
What are plasticised PVC used for?
A
Electrical cable insulation + clothing
