IB Chemistry HL 3.4.11 Electrophilic Addition Mechanisms Question Bank

Practise IB Chemistry HL 3.4.11 Electrophilic Addition Mechanisms with focused questions linking reaction structure, mechanism and observed products.

Exam points

start the first curly arrow at the alkene π bond and direct it to the electrophile
show heterolytic bond breaking and the correct charged carbocation or halonium intermediate
complete attack by the nucleophile with every curly arrow beginning at an electron pair

[Maximum number: 3]

Organic compounds have many industrial applications.

An alkene such as ethene can be used as starting material for a range of compounds.

Describe the mechanism of this reaction, using curly arrows to represent the movement of electron pairs.

Figure for Answer to Question 3.4.11 (HL)—Electrophilic addition mechanisms question 1 — IB Chemistry HL

curly arrow from C=C bond to Br AND curly arrow showing Br-Br bond breaking

carbocation with charge on correct atom

curly arrow from lone pair/negative charge on $\mathrm{Br}^{-}$ to $\mathrm{C}^{+}$

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3.4.11 (HL)—Electrophilic addition mechanisms question 1