oxime
A derivative of an aldehyde or a ketone
(termed aldoxime and ketoxime, respectively) formed by the condensation
with hydroxylamine (NH2OH), and containing the group C=N–OH.
Being easily isolated and with characteristic melting
points, oximes are used in qualitative analysis for identification of
aldehydes and ketones. For example, acetaldehyde
(ethanal) forms the aldoxime CH3CH=NOH, and acetone
(propanone) forms the ketoxime (CH3)2C=NOH. Ketoximes
undergo the Beckmann rearrangement.
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