& Mark Scheme (Merged)
, 2
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Answer all questions in the spaces provided. box
0 1 This question is about different ways to make 1,2-dichlorobutane.
0 1 . 1 Give the name of the mechanism for reaction 1.
State one essential condition needed for reaction 1.
[2 marks]
Name of mechanism
Essential condition
0 1 . 2 Give equations to show three essential steps in the mechanism for reaction 1.
[3 marks]
IB/M/Jun25/7405/2
, 3
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0 1 . 3 Suggest two reasons why using reaction 1 is likely to give a low yield of box
1,2-dichlorobutane.
[2 marks]
Reason 1
Reason 2
0 1 . 4 Give a suitable reagent and conditions needed for reaction 2.
[2 marks]
Reagent
Conditions
0 1 . 5 Identify the reagent and name the mechanism for reaction
3. [2 marks]
Reagent
Name of mechanism
0 1 . 6 Use of the reagent for reaction 2 followed by the reagent for reaction 3 gives another
organic product.
Give the structure of the other organic product.
[1 mark]
12
IB/M/Jun25/7405/2
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IB/M/Jun25/7405/2