Home
Class 11
CHEMISTRY
The reaction BrCH(2)CH(2)Br+Znoverset(...

The reaction
`BrCH_(2)CH_(2)Br+Znoverset(CH_(3)CO_(2)H)rarrCH_(2)=CH_(2)+ZnBr_(2)`
proceeds by the …… mechanism.

A

`E1-cB`

B

`E2`,syn-elimination

C

`E2`,anti elimination

D

`E1`

Text Solution

Verified by Experts

The correct Answer is:
C
Both addition ( to the alkene) and elimination ( from the dibromide) of the `Br` atoms are predominantly trans, i.e., steroselective. These observations may be explained in terms of the formation of a bridged intermediate. It also folowes from this that the configuration of the protected alkene remains unchanged.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

The reaction BrCH_(2)CH_(2)CH_(2)Br+Mg overset(Et_(2)O) to Product mainly

Condiser the reactions, (i) (CH_(3))_(2)CH-CH_(2)Broverset(C_(2)H_(5)OH)rarr(CH_(3))_(2)CH-CH_(2)OC_(2)H_(5)+HBr (ii) (CH_(3))_(2)CH-CH_(2)Broverset(C_(2)H_(5)O^(-))rarr(CH_(3))_(2)CH-CH_(2)OC_(2)H_(5)+Br^(-) The mechanism of reactions (i) and (ii) are respectively :

Knowledge Check

  • In the reaction BrCH_(2)-CH_(2)Br+ZnrarrY+ZnBr_(2),Y is

    A
    ethyne
    B
    ethene
    C
    ethane
    D
    None of these

  • In reaction BrCH_(2)-CH_(2)Br+Zn to Y+ZnBr_(2) . Y is

    A
    Ethyne
    B
    Ethene
    C
    Ethane
    D
    None

  • Consider the reactions (i) (CH_(3))_(2)CH-CH_(2)Broverset(C_(2)H_(5)OH)rarr (CH_(3))_(2)CH-CH_(2)OC_(2)H_(5)+HBr (ii) (CH_(3))_(2)CH-CH_(2)Broverset(C_(2)H_(5)O^(-))rarr (CH_(3))_(2)CH-CH_(2)OC_(2)H_(5) + Br^(-) The mechanisms of reactions (i) and (ii) are respectively

    A
    `S_(N^(2))` and `S_(N^(2))`
    B
    `S_(N^(2))` and `S_(N^(1))`
    C
    `S_(N^(1))` and `S_(N^(2))`
    D
    `S_(N^(1))` and `S_(N^(1))`

    • Similar Questions

    Explore conceptually related problems

    In the reaction CH_(3)CH_(2)C Cl_(2)CH_(3)overset(x)rarrCH_(3)C-=C CH_(3) the reagent X is -

    The IUPAC name of BrCH_(2)underset(CONH_(2))underset(|)(CHCOCH_(2))CH_(2)CH_(3) , is:

    In the given reaction CH_(2)=CH-CHOoverset([X])rarrCH_(2)=CH-CH_(2)OH [X] will be

    CH_(3)CH_(2)-=Noverset(X)rarrCH_(3)CH_(2)CHO the compound X is :

    The reaction CH_(3) CH_(2) Br overset("Alc." KOH)underset(Delta)(to) CH_2 = CH_2+ H_2O , is a/an

    Home
    Profile