IB Chemistry SL 3.4.5 Electrophilic Addition Question Bank

Practise IB Chemistry SL 3.4.5 Electrophilic Addition with questions linking electron-rich and electron-poor species to reaction products.

Exam points

identify the electron-rich π bond as the region susceptible to electrophilic attack
replace the π component of C=C with two new single bonds to the added groups
deduce alkene addition products with correct connectivity and retained carbon skeleton

[Maximum number: 3]

Alkenes, such as A (shown below), are important intermediates in the petrochemical industry because they undergo addition reactions to produce a wide variety of products, such as the conversion shown below.

Figure for Question 3.4.5—Electrophilic addition to alkenes question 1 — IB Chemistry SL

(a)

State the reagent required to convert A into B.

[ 1 ]

(b)

A can also be converted into C without going via B. State the reagent and conditions required.

[ 2 ]

water / steam; ..... [2]
heat and acid catalyst /(concentrated) $\mathrm{H}_{2} \mathrm{SO}_{4} / \mathrm{H}_{3} \mathrm{PO}_{4}$ ;

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3.4.5—Electrophilic addition to alkenes question 1

Question (a)

Question (b)