What is "amidogen"

Hydrazine \Hy"dra*zine\, n. [Hydr- + azo- + -ine.] (Chem.) Any one of a series of nitrogenous bases, resembling the amines and produced by the reduction of certain nitroso and diazo compounds; as, methyl hydrazine, phenyl hydrazine, etc. They are derivatives of hydrazine proper, H2N.NH2, which is a doubled amido group, recently (1887) isolated as a stable, colorless gas, with a peculiar, irritating odor. As a base it forms distinct salts. Called also diamide, amidogen, (or more properly diamidogen), etc.

n. (context chemistry dated English) A compound radical, NH₂, not yet obtained in a separate state, which may be regarded as ammonia from the molecule of which one of the hydrogen atoms has been removed; called also the amido group.

In chemistry, amidogen is a radical compound of nitrogen and hydrogen with the formula NH. A member of the amino group, it may be regarded as an ammonia (NH) molecule which has had one of its hydrogen atoms removed. Although amidogen forms part of many compounds, e.g. the phenethylamines, it has not yet been isolated in a separate state.