Rank the following radicals in order of increasing stability,putting the least stable first.

Question

Quizplus · Accepted Answer

The stability of radicals is determined by the number of electron-donating groups attached to the radical center. In compound I, there is no electron-donating group attached to the radical center, making it the least stable. In compound II, there is one electron-donating group (the methyl group) attached to the radical center, making it more stable than compound I. In compound III, there are two electron-donating groups (the methyl and the tert-butyl group) attached to the radical center, making it the most stable radical. Therefore, the correct order of increasing stability is III < II < I, corresponding to choice C.

Rank the Following Radicals in Order of Increasing Stability,putting the Least