Alkenes

What is an alkene?
Unsaturated hydrocarbon
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What is the formula for an alkene?
C2H2n
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What two isomers are formed from alkenes?
Positional and geometrical
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What is a position isomer?
Where the functional group (double bond) is in a different position
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What is a geometrical isomer?
E-Z isomerism
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Name 2 properties of alkenes
Not soluble in water, boiling points increase with chain length
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What reactions do alkenes undergo?
Addition and electrophilic
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What is positive inductive effect?
When a double bond isn't in the middle,2 products are formed - the most stable atoms are most produced (secondary or tertiary)
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How does electrophilic addition occur with halogens?
Double bond induces a dipole on the halogen
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What will happen to bromine water if an alkene is present?
It will decolourise bromine water
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What part of sulfuric acid is the electrophile?
Polar bond between O-H
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What is produced when you add water to the product of electrophilic addiction with sulfuric acid?
An alcohol and sulfuric acid
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What conditions are needed to react an alkene with water?
Steam, suitable temp & pressure, acid catalyst (phosphoric acid)
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What is created when an alkene reacts with water?
An alcohol
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What is an addition polymer?
Polymers made from many alkene monomers
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What is a repeat unit?
An alkene without the double bond which creates the polymer
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How can addition polymers be modified?
Using plasticiers
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What conditions are needed for low density polymers?
High temp & high pressure
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What conditions are needed for high density polymers?
Low temp & low pressure, zielger-natta catalyst
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Other cards in this set

Card 2

Front

What is the formula for an alkene?

Back

C2H2n

Card 3

Front

What two isomers are formed from alkenes?

Back

Preview of the front of card 3

Card 4

Front

What is a position isomer?

Back

Preview of the front of card 4

Card 5

Front

What is a geometrical isomer?

Back

Preview of the front of card 5
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