Alkenes 0.0 / 5 ? ChemistryFunctional GroupsA2/A-levelAQA Created by: izzybook25Created on: 30-04-18 18:58 What is an alkene? Unsaturated hydrocarbon 1 of 19 What is the formula for an alkene? C2H2n 2 of 19 What two isomers are formed from alkenes? Positional and geometrical 3 of 19 What is a position isomer? Where the functional group (double bond) is in a different position 4 of 19 What is a geometrical isomer? E-Z isomerism 5 of 19 Name 2 properties of alkenes Not soluble in water, boiling points increase with chain length 6 of 19 What reactions do alkenes undergo? Addition and electrophilic 7 of 19 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) 8 of 19 How does electrophilic addition occur with halogens? Double bond induces a dipole on the halogen 9 of 19 What will happen to bromine water if an alkene is present? It will decolourise bromine water 10 of 19 What part of sulfuric acid is the electrophile? Polar bond between O-H 11 of 19 What is produced when you add water to the product of electrophilic addiction with sulfuric acid? An alcohol and sulfuric acid 12 of 19 What conditions are needed to react an alkene with water? Steam, suitable temp & pressure, acid catalyst (phosphoric acid) 13 of 19 What is created when an alkene reacts with water? An alcohol 14 of 19 What is an addition polymer? Polymers made from many alkene monomers 15 of 19 What is a repeat unit? An alkene without the double bond which creates the polymer 16 of 19 How can addition polymers be modified? Using plasticiers 17 of 19 What conditions are needed for low density polymers? High temp & high pressure 18 of 19 What conditions are needed for high density polymers? Low temp & low pressure, zielger-natta catalyst 19 of 19
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