Arrange in order of decreasing reactivity in electrophilic addition: `(I) Ph CH=CH COOH` `(II) p-NO_(2)-C_(6)H_(4)-CH=CH COOH` `(III) p-MeO C_(6)H_(4)
Arrange in order of decreasing reactivity in electrophilic addition:
`(I) Ph CH=CH COOH`
`(II) p-NO_(2)-C_(6)H_(4)-CH=CH COOH`
`(III) p-MeO C_(6)H_(4)CH=CH COOH`
`(IV) p-C1C_(6)H_(4)CH=CHCOOH`
A. `II gt I gt IV gt III`
B. `III gt IV gt I gt II`
C. `III gt I gt IV gt II`
D. `II gt IV gt I gt III`
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Correct Answer - C
Rds is formation of carbocation in case of `A_(E)` reactions and order of stability of various carbocations is :
`p-MeO-C_(6)H_(4)-overset(o+)CH-CH_(2)COOH`
`gtPh-overset(o+)CH-CH_(2)COOH`
`p-Cl-C_(6)H_(4)overset(o+)CH-CH_(2)-COOH`
`gtp-NO_(2)-C_(6)H_(4)overset(o+)CH-CH_(2)COOH`
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