Organic Chemistry - Alkenes Flashcards
1
Q
what functional group do alkenes contain?
A
C=C
2
Q
what do the names of alkenes end with?
A
“ene”
3
Q
what is the general formula for alkenes?
A
CₙH₂ₙ
4
Q
what type of hydrocarbons are alkenes?
A
unsaturated as they have a double bond
5
Q
what is the reaction between alkenes and bromine?
A
- alkenes react with bromine water. UV light is not required for this reaction
- the double bond is broken and the bromine atoms are added (addition reaction)
- during this reaction there is a colour change from orange to colourless
6
Q
how is bromine water used to distinguish between an alkane and an alkene?
A
- in the absence of UV light an alkane added to bromine water will not react: the bromine water will stay orange
- however, alkenes react with bromine water even without UV light. there will be a colour change of orange to colourless.
