Any ionic derivative of ammonia in which a hydrogen atom has been replaced with a metal cation
Any derivative of an oxoacid in which the hydroxyl group has been replaced with an amino or substituted amino group; especially such derivatives of a carboxylic acid, the carboxamides
It may also be regarded as ammonia in which one or more hydrogen atoms have been replaced by an acid atom or radical
Any member of either of two classes of nitrogen-containing organic compounds related to ammonia and amines and containing a carbonyl group (CO; see functional group). The first class, covalent amides are formed by replacing the hydroxyl group (OH) of an acid with an amino group (NR2, in which R may represent a hydrogen atom or an organic combining group, such as methyl). Amides formed from carboxylic acids, called carboxamides, are solids except for the simplest, formamide, a liquid. They do not conduct electricity, have high boiling points, and (when liquid) are good solvents. There are no practical natural sources of simple covalent amides, but the peptides and proteins in living systems are long chains (polymers) with peptide bonds (see covalent bond), which are amide linkages. Urea is an amide with two amino groups. Commercially important covalent amides include several used as solvents; others are the sulfa drugs and nylon. The second class, ionic (salt-like) amides (see ionic bond), are made by treating a covalent amide, an amine, or ammonia with a reactive metal (e.g., sodium) and are strongly alkaline