Stability between benzyl free radical and tertiary free radical
Yes correct....in case of t-butyl cation it is more stable than benzylic cation due to 9 alpha hydrogen hyperconjugation, 3 methyl gropu inductive effect...it is proved by hydride ion affinity that t-butyl cation have ∆H -231 kcal/mol while benzylic cation have ∆H -234 kcal/mol...if talk about any other tertiary cation excpt t-butyl cation then benzylic cation have more stability....and it is the same case in free redical