How can explain that 1, 3, 5-Trihydroxybenzene give positive iodoform test?

1,3,5-trihydroxybenzene give positive iodoform test because it is in equilibrium with its tautomer cyclohexane-1,3,5-trione. It give 3,5-dioxohexanoic acid (CH₃-CO-CH₂-CO-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.

Related Questions:
How can explain resorcinol (1, 3-Dihydroxybenzene) give positive Iodoform test?

How can write dehydration mechanism of 1,2,3-Trihydroxymethylcyclopropane into Benzene in acidic medium?

Mechanism:

The dehydration of “1,2,3-Trihydroxymethylcyclopropane” in acidic medium follow E1 elimination mechanism . After performing E1 thrice it was expecting that the major product is Benzene.The steps wise mechanism written through carbocation formation and simple dehydration is given as below.

Related Questions:

(1) Explain Dehydration and ring expansion mechanism of 1-(1-Methylcyclopentyl)ethan-ol?

(2) Write Dehydration and ring expansion mechanism of 1-cyclobutylethanol in the presence of con H2SO4.

(3) How to write dehydration and ring expansion mechanism of 2-cyclopentylethanol?

(4) Dehydration of 1-(1-Methylcyclopentyl)ethan-ol follow E1 Elimination Mechanism and take place in the presence concentrate sulphuric acid:

(5) Explain the ring expansion mechanism of Bicyclic 1,2-Diols which undergoes pinacol pinacolone mechanism?

(6) How to write dehydration and ring expansion mechanism of 2-cyclopentylethanol?
(7) Write the major and minor product of hydration of 1-Methylcyclopent-1-ene in acidic medium?

How is glycerol obtained from propene?

Glycerol can prepared from propene by following chemical sequences.

The Glycerol prepared by from propene is called as Synthetic Glycerol.

Related question:

How is glycerol obtained from propene?

How can you convert glycerol into Acrolein?

What is the product formed when glycerol react with Excess HI?

What is Noble’s oil and how can obtained from glycerol/glycerine?

What are different products obtained when glycerol is heated with oxalic acid at different temperature?

How can you convert glycerol into Acrolein?

When Glycerol treated with dehydrating agents like H₂SO₄, P₂O₅ or KHSO₄ then it undergoes dehydration and remove all the water molecules to give unsaturated Aldehyde named Acrolein.

Related question:

How is glycerol obtained from propene?

How can you convert glycerol into Acrolein?

What is the product formed when glycerol react with Excess HI?

What is Noble’s oil and how can obtained from glycerol/glycerine?

What are different products obtained when glycerol is heated with oxalic acid at different temperature?

What is the product formed when glycerol react with Excess HI?

Reaction of glycerol with limited amount of warmed HI gives allyl iodide.

While in the presence of excess amount of HI, then allyl iodide reduced to propene, which further reacts with HI and forms isopropyle iodide.

Related question:

How is glycerol obtained from propene?

How can you convert glycerol into Acrolein?

What is the product formed when glycerol react with Excess HI?

What is Noble’s oil and how can obtained from glycerol/glycerine?

What are different products obtained when glycerol is heated with oxalic acid at different temperature?