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beta- Elimination or anti-eliminination ...

`beta-` Elimination or anti-eliminination reaction is carried out with base `(B^(o-))` as shown below:

The following bases are used.
I. `overset(o-)(O)H`
II. `RO^(o-)`
III. `RCOO^(o-)` , IV. `overset(o-)(C)N`
V. `NO_(3)^(o-)`
The decreasing order of reactivity for the above elimination is:

A

`(II) gt (I) gt (IV) gt (III) gt (V)`

B

`(V) gt (III) gt (IV) gt (I) gt (II)`

C

`(II) gt (I) gt (III) gt (IV) gt (V)`

D

`(I) gt (II) gt (III) gt (IV) gt (V)`

Text Solution

Verified by Experts

The correct Answer is:
`a`
The regent should be a strong Bronsted base.
Acidic order: `HNO_(3) gt RCOOH gt HCN gt H_(2) gt ROH`
Basic order: `NO_(3)^(o-) lt RCOO^(o-) lt CN^(o-) lt overset(o-)(O)H lt RO^(o-)`
`(V) lt (III) lt (IV) lt (I) lt (III)`
Decreasing order of basically and hence `beta-` elimination is: `(II) gt (I) gt (IV) gt (III) gt (IV)`
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