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Arrange the following alkenes towards or...

Arrange the following alkenes towards order of increasing reactivity in cationic polymerization:
`H_(2)C=CHCH_(3), CICH=CH_(2), H_(2)C=CHC_(6)H_(5)`,
`H_(2)C=CHCOOCH_(3)`

Text Solution

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Reactivity towards cationic polymerization increases as the stability of the inmtermediate carbocation increases. Since the stability of the intermediate carbocations increases in the order :
`H_(3)C-overset(+)(CH)-CO_(2)CH_(3)ltH_(3)C-overset(+)(CH)-CIlt CH_(3)-overset(+)(CH)-CH_(3)lt H_(3)C-overset(+)(CH)-C_(6)H_(5)`
therefore, reactivity of the corresponding alkenes towards cationic polymerization increases in the same order : `H_(2)C=CHCO_(2)CH_(3)lt H_(2)C=CHCI lt H_(2)C=CHCH_(3)lt CH_(2)=CHC_(6)H_(5)` .
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