1.

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-eliminationC. `E2`,anti eliminationD. `E1`

Answer» Correct Answer - 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.


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