We know that methyl ketones and secondary alcohols oxidizable to methyl ketones, such as isopropanol. The only primary alcohol and aldehyde to undergo this reaction are ethanol and acetaldehyde, respectively. 1,3-Diketones such as acetylacetone also give the haloform reaction. Do Terminal Alkynes give Haloform Reaction if Yes then how the mechanism will follow?
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Maybe if you react with H2SO4/HgSO4 to make an aldehyde beforehand. I don't think a plain terminal alkyne will give the haloform test. – Aniruddha Deb Jun 09 '20 at 14:56
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And if it is attached to some aromatic ring ? – SARTHAK AGARWAL Jun 09 '20 at 14:58
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You should read this: https://chemistry.stackexchange.com/questions/135626/do-cyclohexane-1-3-diones-give-positive-haloform-reactions – user55119 Jun 25 '20 at 22:36
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Terminal alkynes, including phenyl acetylene, react with iodine (in MeOH) to give 1,2-diiodoalkenes according to this JOC paper here. Presence or absence of base will not alter the outcome. Presence of AgNO3 gives some di-iodo ketone which can then give rise to the iodoform reaction.
Waylander
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