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Ethene on reaction with Br(2) in H(2)O f...

Ethene on reaction with `Br_(2)` in `H_(2)O` forms mainly

A

`2`-bromoethanol

B

`1,2`-boromoethane

C

ethane-`1,2`-diol

D

an equimolar mixture of `(1`) and `(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
If the halogenation of an alkene is carried out in aqueous solution rather than in `C Cl_(4)`, the major product of the overall reaction is not a vic-dihalide but a haloalcohol or halohydrin because the solubility of `Br_(2)` in `H_(2)O` is low. "Thus", `C_(Br^(-))lt ltC_(H_(2)overset(..)o: )` "in the second step".
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Knowledge Check

  • cis-But -2- en on reaction with Br_(2) in C CI_(4) produces mainly

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

  • Phenol reacts with Br_(2) in H_(2)O to give

    A
    m-bromophenol
    B
    o and p-bromophenol
    C
    p-bromophenol
    D
    2, 4, 6-tribromphenol

  • 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