1 If the invitation says black tie, women should wear a floor-length, evening gown. 2  A tuxedo is mandatory if you're a man. 3  This is your chance to dress as if you were headed to the Oscars. 4  Black tie optional means that wearing a tuxedo or long evening gown is not mandatory, but guests should feel free to do so.
Ether is an organic functional group consisting of a disubstituted oxygen, or an oxygen atom bonded to 2 carbon atoms (if adjacent to a ketone, functional group is then called an ester).
Alcohols, Phenols, and Ethers. An alcohol is an organic compound that contains the hydroxyl group (-OH) attached to. an alkyl group. They are essentially alkanes in which a single hydrogen has been replaced. with an âOH group. A phenol has an âOH group bonded directly to a benzene ring. An. ether has an oxygen atom bound to two alkyl groups.