triamiden.
/ˈtrʌɪəmʌɪd/ Chemistry.
A compound in which the three acid hydroxyls (OH) of a tribasic acid are replaced by three amidogen groups (NH2): the hydrogen of the amidogen groups may be replaced by metals or by one or more monovalent radicals; e.g. citramide, C3H4(OH)(CO.NH2)3, the triamide of citric acid, C3H4(OH)(CO.OH)3; cyanuramide or melamine, C3N3(NH2)3, the triamide of cyanuric acid, C3N3(OH)3. For the earlier view of the structure of triamides, see quot. 1863.
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1862 W. A. Miller Elements Chem. (ed. 2) III. 427 As an instance of a secondary triamide, phenylcitramide may be given.
1863 H. Watts Dict. Chem. I. 173 Primary Triamides.—They represent 3 molecules of ammonia, in which 3 atoms of hydrogen are replaced by a triatomic acid-radicle: Phosphamide..N3.(PO)'''.H6.
1866 W. Odling Lect. Animal Chem. 19 C3N3(H2N)3 Cyanuric triamide.
This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2020).
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