Question

8)Write IUPAC names of the products obtained by addition reactions of HBr to pent-1-ene and name them (i) In the absence of peroxide (ii) In the presence of peroxide​

Answer 1

Answer:

1) In the absence of peroxide. Hexene reacts with HBr in the absence of organic peroxide to form 2-Bromohexane. Addition takes place according to Markownikoffs rule.

CH2=CH-CH2-CH2-CH2-CH3+H-Br

hex-1-ene

no peroxide :- CH3-CH-CH2-CH2-CH2-CH3

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Br

2-bromohexane

2) In the presence of peroxide. Hex-1-ene reacts with HBr in the presence of peroxide to form 1-bromohexane.

CH2=CH-CH2-CH2-CH2-CH3+H-Br

hex-1-ene

peroxide:- CH2-CH2-CH2-CH2-CH2-CH2

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Br

1-bromohexane