Schiff base

In organic chemistry, a Schiff base (named after Hugo Schiff) is a compound with the general structure R1R2C=NR3 (R3 = alkyl or aryl, but not hydrogen). They can be considered a sub-class of imines, being either secondary ketimines or secondary aldimines depending on their structure. Anil refers to a common subset of Schiff bases: imines derived from anilines. The term can be synonymous with azomethine which refers specifically to secondary aldimines (i.e. R−CH=NR' where R' ≠ H).

Not to be confused with Schiff test.
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