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a) Draw the two major products obtained in the reaction shown.
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b) Draw the two major products obtained in the reaction shown.
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♦ Relevant knowledge
Addition reaction
In addition occurs, a group of atoms are added to the molecules. For example reduction by NaBH4, cycloaddition reaction(where two molecules added and form one molecule), hydrobromination of alkene(where Hydrogen and Bromine added to double/triple bond).
Answer
a) One reaction that is the first one to occur is called the hydrobromination reaction. The first protonation of double bonds takes place. After protonation, the most stable carbocation forms.
The carbocation above is tertiary in nature and has stability in conjugation.
b)
The second reaction is a bromination reacti. Both double bonds are identical.
In the initial step, a cyclic Ion is created. The bromide ion is attacked by the bromonium ion before opening it up, creating dibromo products.
This attack of bromide ion occurs in a the 1,2 or 1,4 method. Thus two products are formed in the following manner.