Resorcinol (1,3-Dihydroxybenzene) give
positive iodoform test because it is in equilibrium with its tautomer cyclohex-2-en-1,5-dione.
It give 3, 5-dioxohexanoic acid (CH3-CO-CH=CH-CH2-COOH) on reaction with strong base (OH-) (I2+NaOH Iodoform reagent)
,which has a CH3-CO (acetyl) group, so it’ clear that it would be
give positive iodoform test.
How can explain that 1, 3, 5-Trihydroxybenzene give positive iodoform test?
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