Aarti Gupta
Last Activity: 10 Years ago
Iodoform reaction
comes under the haloform reaction where a haloform (CHX3,
where X is a halogen)is produced by the exhaustive halogenation
of a methyl ketone
(a molecule containing the R–CO–CH3 group) in the presence of a base,R may be H,alkyl or aryl. The reaction can
be used to produce chloroform(CHCl3), bromoform
(CHBr3), or iodoform (CHI3).
Iodoform test :-When iodine and sodium hydroxide are used as the reagents,
a positive reaction gives iodoform. Iodoform (CHI3) is a pale-yellow
substance. Due to its high mloar mass caused by the three iodine atoms, it is
solid at room temperature (cf. chloroform and bromoform). It is insoluble in
water and has an antiseptic smell. A visible precipitate of this compound
will form from a sample only when either a methyl ketone, ethanal, ethanol, or
a methyl secondary alcohol is present.
Thanks & Regards
Aarti Gupta
askiitians Faculty