radical substitution

Question 1

chlorination

Answer 1

excess methane= chloromethane produced
excess chlorine= tetrachloromethane produced

Question 2

chlorination initiation

Answer 2

initation= generates free radicals Cl2 -light–> 2Cl

Question 3

chlorination propagation

Answer 3

involve free radical
generate new one
CH4 + Cl. –> CH3 . + HCl
CH3 . + Cl2 –> CH3Cl + Cl.

Question 4

chlorination termination

Answer 4

two free radicals form covalent bond
2CH3. –> C2H6
2Cl. –> Cl2
CH3 . + Cl. –> CH3Cl

Question 5

limitations

Answer 5

volatile process
- extremely reactive so further substitution can happen
- can produce compounds that weren’t needed
no control over point on chain where substitution happens
- gives little control on exact molecules produced
longer alkane chains may be produced- waste of reagents