alkenes
- Created by: Margaret Hobart
- Created on: 14-05-21 09:14
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- alkenes
- structure and bonding
- unsaturated hydrocarbons
- bromine water test
- orange to colourless if C=C present
- bromine water test
- C=C has high e- density
- alkenes with more than 4 carbon atoms have positional isomerism
- stereoisomerism
- restricted movement around C=C
- E-Z isomerism
- restricted movement around C=C
- unsaturated hydrocarbons
- electrophilic addition reactions
- electrophile are e- pair acceptors
- attack C=C
- polarises Br-Br
- attack C=C
- two molecules join together to make one larger molecule e.g. polymerisation
- if alkene is unsymetrical there may be a mix of products
- depends on intermediate product's cation stability
- the carbocations with more alkyl groups are more stable
- A carbocation is an organic ion which contains a carbon atom which is positively charged
- depends on intermediate product's cation stability
- addition polymers
- unreactive beacause the main carbon chain of a polyalkane is non-polar and only contains single C bonds
- as chain increases
- stronger VDWs
- more rigid
- higher mp/bp
- more rigid
- stronger VDWs
- as chain increases
- unreactive beacause the main carbon chain of a polyalkane is non-polar and only contains single C bonds
- electrophile are e- pair acceptors
- PVCs
- polyvynlchloride
- plasticised PVC used for cable insulation, clothing and tile s
- rigid PVC used for window frames and drainpipes
- structure and bonding
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