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.
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

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

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 :

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

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))`