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Propene on reaction with Br(2) "in" C Cl...

Propene on reaction with `Br_(2) "in" C Cl_(4)` yields

A

`3`-bromopropane

B

cis-`1,2`-dibromopropane

C

trans-`1,2`-dibromopropane

D

`(+-)1,2`-dibromopropane

Text Solution

Verified by Experts

The correct Answer is:
D
`CH_(3)CH=CH_(2)underset(C Cl_(4))overset(Br_(2))rarroverset(3)(C )H_(3)underset(Br)underset(|)overset(2)(C )Hoverset(1)CH_(2)Br`
Note that `C-2` is asymmetrical. Thus, the product is optically active. Since the bromonium ion is symmetrical, each `C` atom is attacked equally well and , consequently, results in the formation of enantiomers in equal amounts.
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Knowledge Check

  • Cyclohexene on reaction with Br_(2) in C CI_(4) yields

    A
    meso`-1,2`-dibromocyclohexene
    B
    `(+-)`trans`-1,2-`dibromocyclohexene
    C
    cis-`1,2-`dibromocyclohexene
    D
    trans`-1,2-`dibromochclohexane

  • trans-But -2- en on reaction with Br_(2) in C CI_(4) forms

    A
    `(+)-2,3-`dibromobutane
    B
    `(-)-2,3-`dibrombutane
    C
    `(+-)-2,3-`dibromobutane
    D
    meso-dibromobutane

  • Cyclohexane when treated with Br_(2) in C Cl_(4) gives

    A
    Bromocyclohexane
    B
    trans-1,2-Dibromocyclohexane
    C
    cis-1,2-Dibromocyclohexane
    D
    none of these

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