Summary All AQA A-Level Chemistry Mechanisms

Mechanism Summary for A-level AQA Chemistry


 


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H H H H H H H H
H H
+
C C H C C H H C C H H3C C C CH3 +
H3C C C CH3
H H Br δ+
Br δ+ Br Br H H
:Br - δ- :Br -
Br δ- Br
H H


 


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H3C C C CH3

H H H H Br H
+
H3C C C H H3C C C H
  
  

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δ+ H #
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H -:OSO
2OH H H H H
OSO 2OH
δ- CH3 C C H
H H CH3 C C H

  

H3C C C H Br H
H :OH-
OSO 2OH


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H
H H H H H
H3C C CH3 CH3 +
H3C C H C C CH3 H C C CH3
)&
 $/-&3
O H +
'2/-
4)& O H H 
:




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  H


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H H H H H H
H H
+
H C C H H C C H H C C H
C C
+
H H H H H O H H O 
)&
 $/-&3
'2/- O
 H H
4)&
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  H



   

 

  
 

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 H H STEP ONE Initiation
δ+ δ- Essential condition: UV light
H3C C Br H3C C OH + :Br -
Br2
2Br
.
-HO:
H H
STEP TWO Propagation
CH3CH3 + Br
HBr + CH3CH2
. .


  
  

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 .
CH3CH2 + Br2
CH3CH2Br + Br
.
H H
δ + δ- STEP THREE Termination
H 3C C Br H 3C C CN + :Br - .
CH3CH2 + Br
CH3CH2Br
.
-NC:
H H .
CH3CH2 + CH3CH2
CH3CH2CH2CH3
.