11. Radical Reactions

What is the correct order of stability of the following alkyl radicals (from most stable to least stable): $\mathrm{tertiary}$, $\mathrm{secondary}$, $\mathrm{primary}$, $\mathrm{methyl}$?

Which of the following is the most stable radical?

Rank the following carbon radicals in order of decreasing stability: ${\mathrm{CH}}^3\cdot$ (methyl radical), $\mathrm{CH}{3}_2\mathrm{CH}\cdot$ (secondary radical), $\mathrm{CH}{3}_{3}C\cdot$ (tertiary radical), $\mathrm{CH}{3}_1\mathrm{CH}\cdot$ (primary radical).

Which of the following radicals formed by cleavage of a $C–H$ bond is the most stable in isobutane (${\mathrm{(CH}}_3{)}_3\mathrm{CH}$)?

Which of the following radicals is the most stable?

Use the information in Table 4-2 (p. 167) to rank the following radicals in decreasing order of stability.