Organic Chem- Free Radical Substitution

Question 1

How do you make methane react with bromine/ chlorine?

Answer 1

UV light to break the bond

Question 2

What is a photochemical reaction??

Answer 2

A reaction that takes place with Uv light

Question 3

What is a substitution reaction??

Answer 3

When hydrogen atoms in a hydrocarbon are replaced by halogens one at a time

Question 4

What is the initiation reaction??

Answer 4

Where the first free radicals are made by splitting a halogen molecule
Cl2—2Cl•

This is homolytic fission

Question 5

What are propagation reactions??

Answer 5

All the reactions that keep the chain going
Every other reaction is a repeat

First one makes the alkane free radical and a hydrogen halide

Second one make a halogen free radical and the chlroalkane

Question 6

What are termination reactions

Answer 6

Removing free radicals from the system by reaction two

Question 7

What are Diradicals

Answer 7

Where there is a pair of free electrons in eg when ozone breaks down, you have no dot after the radical (O)

Question 8

What is a radical

Answer 8

species with an unpaired electron