Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Input: BartonMcCombie deoxygenation converts tributyltin hydride into one of these compounds in order to remove a hydroxyl group. They can be reacted with nitrones or nitroso compounds to form a stable spin adduct, allowing for the measurement of hyperfine splitting due to spin coupling with the nucleus; that is the spin trapping technique. AIBN is used to create these compounds with a net release of nitrogen gas. They are (*) often created by treating reagents with peroxide and light, since the oxygen-oxygen bond in peroxide easily undergoes homolytic cleavage, and they can be analyzed by electron spin resonance. Reactions involving them, such as anti-Markovnikov additions and chain polymerizations, consist of initiation, propagation, and termination steps. For 10 points, name these compounds removed by antioxidants that have unpaired electrons.
Output:
Science