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Enthalpy

Enthalpy

6. Thermodynamics and Kinetics / Enthalpy / Problem 6

Which radical is more stable in terms of bond-dissociation energy? Rationalize the difference in stability based on their structures.

A

Radical (i) is more stable than (ii) due to the presence of a delocalized free radical via the inductive effect in (ii).

B

Radical (ii) is more stable than (i) due to the presence of a delocalized free radical via the resonance effect in (ii).

C

Radical (i) is more stable than (ii) due to the presence of alkyl groups that donate electrons via the hyperconjugation effect in (ii).

D

Radical (ii) is more stable than (i) due to the presence of alkyl groups that donate electrons via the electronegative effect in (i).

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