CAIE A-Level Chemistry 14.2.4 Electrophilic Addition Mechanism
Practise drawing electrophilic addition of bromine to ethene and hydrogen bromide to propene with curly arrows.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- AS
Exam points
- show C=C electrons attacking the electrophilic atom and breaking the polarised reagent bond
- draw the charged intermediate with the positive charge on the correct carbon and include lone pairs
- start the second curly arrow at the nucleophile lone pair and end it at the carbocation centre
14.2.4—Mechanism: electrophilic addition in alkenes, question 1
The halogens chlorine, bromine and iodine show trends in chemical and physical properties down the group.
Table 3.1 shows some properties of chlorine, bromine and iodine.
Table 3.1
Iodine monobromide, IBr , is a dark red solid that melts near room temperature.
IBr reacts with propene. The mechanism for this reaction is the same as the mechanism for that of HBr with propene.
Name the mechanism involved in the reaction of IBr with propene.
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