Flashcards in Alkenes Deck (13):
What are Alkenes?
Contains 1 double bonded carbon
What are the first 3 Alkenes?
What are the first six prefixes that relate to the amount of Carbon atoms?
Meth- (1 carbon atom)
What is the general formula for Alkenes?
How do you model Alkenes?
Draw carbon atoms in line first
Add correct number of bonds (remembering 1 double bond)
Add hydrogen atoms
What is a Functional Group?
Atom, group of atoms or type of bond that determines the chemical reactions of an organic compound
How do Alkenes react? Why?
Alkenes can have combustion reactions with the same products as Alkanes
They have a functional group so can take part in a wider range of reactions
Because they have a double bonded carbon, they can take part in Addition reactions
What are Addition reactions?
Reaction in which an atom or group of atoms combines with a molecule to form a larger molecule with no other product
What happens to Alkenes in Addition reactions?
Alkenes react with Bromine to form colourless 'dibromo' compounds
What is a word equation for an example of an Addition reaction with an Alkene?
Ethene + Bromine -> Dibromoethane
How is this addition reaction the basis of a test for unsaturation?
Bromine reacts with Alkenes but not Alkanes
Bromine water turns from orange-brown to colourless when mixed with Alkenes but not with Alkanes
What happens in Addition reactions between Alkenes and Hydrogen?
Alkenes react with hydrogen in the presence of a Nickel catalyst to form Alkanes