Definition of imidic acids

1. Compounds derived from oxoacids RkE(=O)l(OH)m (l not equal to 0) by replacing =O by =NR; thus tautomers of amides. In organic chemistry an unspecified imidic acid is generally a carboximidic acid, RC(=NR)OH. NOC Rule C-451.1; GNOC Recom. R-5.7.2. E.g. RS(=NH)2OH a sulfonodiimidic acid. Cf. imino acids.