2.5 CHEMICAL REACTIONS OF ALKENES

What does the addition of HYDROGEN to ALKENES form? —> HYDROGENATION

ALKANES

What are the conditions for the formation of alkanes

.Nickel catalyst

.High temp of 150 deg

.Reaction is the basis of the manufacture of MARGARINE from liquid veg oils

Write an equation for HYDROGENATION

What does the addition of HALOGENS (chlorine + bromine) to ALKENES form?

DIHALOALKANES

What are the conditions for the formation of dihaloalkanes

.Dark

.Room temp

.Used as a TEST FOR UNSATURATION

What is the test for UNSATURATION?

.Tests for the presence of a C=C double bond

.Orange solution of bromine immediately DECOLOURISED

Write an equation for the addition of halogens to alkenes

What does the addition of STEAM to ALKENES form?

ALCOHOLS (especially ethanol—> hydration of ethane)

What are the conditions for the formation of alcohols

.300deg temp

.60 ATM

.PHOSPHORIC ACID catalyst

Write an equation for the addition of STEAM to alkene

What does the addition of HYDROGEN HALIDS (Hydrogen chloride) to an ALKENE form>

HALOALKANES

Write an equation for the reaction of hydrogen halides with an alkene