Alkenes & their Reactions F332

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  • Created by: Solz
  • Created on: 21-02-14 12:56
What is an Addition Reaction
Where two or more moleculse join together to make a single layer molecule
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What is the colour change when Bromine is added to an alkene
dark brown/red to colourless
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What happens in the addition of bromine to an alkene
It turns into an alkane with two bromine molecules
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When you add bromine WATER to an alkene it goes from orange to colourless.True of False
True
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What happens in the addition of Hydrogen Bromide
A BROMOalkane (C=C bond turns to a C-C bond) is formed , A hydrogen and a bromine molecule is added.and two isomers are produced .
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What are the reagents and conditions for the addition of Hydrogen gas to an alkene , THERE ARE TWO WAYS
Reacting the alkene with hydrogen gas using either platinum caltalyst at Room temperature or Nickel Catalyst at 150 degrees + 5atmospheric pressure
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Which is more expensive to use nickel or platinum
Platiunum
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What is actually forme when adding Hydrogen to an alkene
Alkane with two hydrogen molecules added (H2)
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What does adding water to alkenes produce and what CAN you get
ALCOHOLS and two isomers(same molecular formula different structural formula)
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Whta are the two way of carrying out this reaction( aka Reagents&Conditions)
1.Add water and heat under reflux with Sulphuric acid(H2SO4). 2.add water with phosphoric acid catalyst at 300 degrees at 60 atm pressure
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Which one is used in industry?
2.Phsphoric acid 300deg and 60 atm pressure
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What conditions need to be met in order for a molecule to show E/Z isomerism
Must have a C=C group because double bonds CANT twist. 2. Th ecarbon involved in the double bond must HAVE TWO NON-IDENTICAL groups attatched.
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Memorisation tips for E/Z isomerism
Z= "ZAME" SIDE and E =opposite sides
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Other cards in this set

Card 2

Front

What is the colour change when Bromine is added to an alkene

Back

dark brown/red to colourless

Card 3

Front

What happens in the addition of bromine to an alkene

Back

Preview of the front of card 3

Card 4

Front

When you add bromine WATER to an alkene it goes from orange to colourless.True of False

Back

Preview of the front of card 4

Card 5

Front

What happens in the addition of Hydrogen Bromide

Back

Preview of the front of card 5
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