Reaction of these compounds with a strong acid may
Reaction of these compounds with a strong acid may produce a tri-alkyl oxonium salt.  Allyl aryl ones can undergo the Claissen Rearrangement, and the smallest cyclic member of this group is ethylene oxide, while cyclic poly- ones are known as "crown."  Members of this class of chemicals can be produced by dehydroxation of alcohols or by alkoxide nucleophilic displacement on an alkyl halide, which is known as the Williamson synthesis.  FTP, name these chemical compounds defined by the presence of an oxygen bonded to two alkyl groups and perhaps best known for their diethyl variety, which is a notable anesthetic.
Reaction of these compounds with a strong acid may produce a tri-alkyl oxonium salt.  
ethers