Aarti Gupta
Last Activity: 10 Years ago
Iodoform reaction is given by those compounds which have the following group-
where "R" can be a hydrogen atom or a hydrocarbon group (for example, an alkyl group).
If "R" is hydrogen, then we have the aldehyde ethanal, CH3CHO.Ethanal is the only aldehyde to give the triiodomethane (iodoform) reaction. If "R"is a hydrocarbon group, then we have a ketone. Lots of
ketones give this reaction, but those that do all have a methyl group on
one side of the carbon-oxygen double bond. These are known as methyl ketones.Since formaldehyde(HCHO) does not have this group so it is negative for iodoform test.
Thanks & Regrds
Aarti Gupta
askiitians Faculty