Electrophilic Addition Uni Year 1 Worksheet Page 3

5. By drawing the mechanisms explain what products you would expect from the following

reactions:

6. a) How would you carry out the following?

b) Explain clearly the meaning of the terms stereoselective and regioselective using reactions

of 1- methylcyclopentene as examples.

7. Answer both parts A and B of this question.

A. For the alkenes CH

=CHX where X=H, Me, Ph, NO

, OMe, COMe, Br and CN predict

i) the orientation of addition of HBr and hence the structure of the major product that is

formed;

ii) the relative rate of addition of HBr to the first FIVE alkenes (i.e. X = H, Me, Ph, NO

, OMe).

[10]

B. Indicate the major product for each of the following reactions and give the mechanism of

each reaction

[3 x 5]

8. Draw the products obtained from reaction of A with each of the following reagents. Include

any relevant stereochemistry in your diagrams.

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