Alkenes Flashcards
(15 cards)
What is a stereoisomer?
Molecules that have the same structural formula, but their atoms are arranged differently
Why does E/Z isomerism occur?
Because of the restricted rotation around the C=C bond
What is an E-isomer?
When the matching groups are diagonally across the double bond
What is a Z-isomer?
When the matching groups are both above or below the double bond
How do you figure out which group around the C=C bond takes priority?
By which group has the highest Mr
Draw the mechanism for the reaction of but-1-ene with hydrogen bromide
What is this mechanism called?
Well done
Electrophilic addition
What is an electrophile?
A lone pair acceptor
What is a carbocation?
An intermediate species in a mechanism
What is the order of least to most stable carbocation?
Primary
Secondary
Tertiary
What kind of carbocations are more likely to form in a reaction and why?
More stable carbocations because alkyl groups provide a positive conductive effect (meaning they are electron releasing compared to hydrogen atoms)
What is a polymer?
A long chain molecule made from lots of monomers joined together
What is a monomer?
A small repeating unit from which polymers can be made
What is addition polymerisation?
The formation of long chain polymers from lots of monomers joining together with no other products
Write out the general formula for an addition polymerisation reaction
Well done
