A type of chemical compound containing a C=NH functional group, related to amidines; formerly used in historical chemical terminology.
From 'amide' + '-in' (chemical suffix), representing an older naming convention from 19th-century chemistry.
Amidin illustrates how chemistry's vocabulary evolved as chemists discovered new compound types—what was called 'amidin' would likely be called an 'imidinium salt' or 'amidinium compound' in modern nomenclature.
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