For 10 points, name this functional group which consists of a carbon double bonded to an oxygen and to two other carbon atoms.
These compounds form Weinreb amides by the Wittig reaction, and varieties of these substances with alpha-hydrogen centers participate in a type of tautomerism named for these compounds and enols. Examples of these compounds include a compound with abbreviated formula Ph2CO ("P-H-TWO-C-O"), benzophenone, which like other members of this family features a carbonyl group. For 10 points, name this functional group which consists of a carbon double bonded to an oxygen and to two other carbon atoms.
These compounds form Weinreb amides by the Wittig reaction, and varieties of these substances with alpha-hydrogen centers participate in a type of tautomerism named for these compounds and enols.
{ketones}