It is a carbonyl bonded to a hydrogen and a R group.
Dess-Martin periodinane can be reacted with primary alcohols to produce this functionality. One compound containing this functional group can be produced by reacting ethylene with oxygen in water in the presence of a palladium catalyst, which is known as the Wacker process; although not an alcohol, that compound is believed to cause hangovers. This functionality is treated with a base to produce a (*) carboxylic acid and an alcohol in the Cannizarro reaction. By not oxidizing all the way to a carboxylic acid, the Parikh-Doering and Swern oxidations can also be used to produce this moiety from primary alcohols. It is a carbonyl bonded to a hydrogen and a R group. A silver mirror can be used to distinguish this functionality from, for 10 points, what functional group that isn't a ketone whose simplest example is formaldehyde?
Dess-Martin periodinane can be reacted with primary alcohols to produce this functionality.
aldehydes