Q: 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.
One of these substances with phenyl and methyl substituents is known as anisole, while a cyclic type of these compounds features electronegative interior atoms which capture cations. Along with the "crown" type, epoxides are another class of these compounds which can be synthesized from alcohols and halocarbons in the Williamson synthesis. Containing an oxygen atom bonded to two hydrocarbon groups, for 10 points, name this class of organic compounds derived from the name of a classical Greek heavenly element, the "diethyl" variety of which was formerly used as an anesthetic.
A:
Science