reaction map

Question 1

what is the mechanism where a haloalkane is formed from an alkane?

Answer 1

free radical subsitution

Question 2

what is the condition for free radical substitution?

Answer 2

UV light

Question 3

what is the reagent for free radical substitution?

Answer 3

Cl2/Br2

Question 4

what is the observation in free radical substitution?

Answer 4

orange to colourless

Question 5

what are the stages for free radical substitution?

Answer 5

1. initiation
2. propagation
3. termination

Question 6

why is UV light needed to start a free radical substitution reaction?

Answer 6

it provides energy to break the bond between the halogens

Question 7

define ‘free radical’

Answer 7

a species which has a single unpaired electron

Question 8

what is the overall equation for free radical substitution between CH4 and Cl2?

Answer 8

CH4 + Cl2 -> CH3Cl + HCl

Question 9

what is the initiation equation for CH4 and Cl2?

Answer 9

Cl2 -> 2Cl.

Question 10

what are the propagation equations for CH4 and Cl2?

Answer 10

Cl. + CH4 -> HCl + .CH3
.CH3 + Cl2 -> CH3Cl.