Phenol (without 'trinitro') is already a weak acid: Its Phe-OH group is protolised in water (= deprotonated), pKa=9.89, a very weak acid.
Phe-OH + H2O <--> Phe-O- + H3O+
In 2,4,6-trinitrophenol the acidity is very much stimulated by the presence of these 3 nitrogroups in ortho and para position. pKa=0.38, almost a strong acid.
(This can be explained by socalled resonance structure stabilisation of the picrate ion, (NO2)3Phe-O- , but this is far beyond the scope of this question).
React aniline with HCl/NaNO2 (diazotisation) followed by reaction with KOH to give phenol. Nitration of phenol with fuming nitric acid gives picric acid (or trinitrophenol).
Phenol is flammable.
What are some examples of Phenol
Yes, at room temperature bromine reacts with phenol and forms 2,4,6-tribromo phenol.
Both water and phenol are very weak acids. Though phenol is the stronger of the two.
Picric acid is 2,4,6-trinitro phenol, the nitro groups are electrons withdrawing groups so are responsible to make the bond weaker between oxygen and hydrogen atoms and increase the acidic strength as compare to phenol.
React aniline with HCl/NaNO2 (diazotisation) followed by reaction with KOH to give phenol. Nitration of phenol with fuming nitric acid gives picric acid (or trinitrophenol).
Picric acid is acidic, as it has a fairly acidic phenolic proton. However, picric acid is not a carboxylic acid. Nevertheless, it is still called 'acid' because of its acidic proton, just as phenol was once called 'carbolic acid'.
very easy, a single step reaction. When phenol is heated with Concentrated Nitric acid 2,4.6-trinitrophenol (Picric acid) is produced.
in picric acid we cannot used direct nitration because of the phenol is very sensitive in oxidation of nitrate, to overcome this problem, we used a sulfuric acid added to phenol before the nitric acid. the reaction between NO2 and SO2 are reversible so the sulphate exchange with nitrate becoming tri nitrophenol
There are several organic acids without COOH group , example is carbolic acid , a phenol, picric acid which is 2,4,6 tri-nitro phenol, barbituric acid, ascorbic acid etc
you can say as it contain Phenol ring that is undergoes acetylation process to form -OCOCH3
No. An OH group is not attached to the benzene ring.
There are many known syntheses of phenol. However, a few simple ones are: 1) hydrolysis of chlorobenzene: - chlorobenzene + water --> phenol + hydrochloric acid 2) oxidation of toluene: - toluene + oxygen --> phenol + carbon dioxide + water 3) oxidation of benzene with nitrous oxide: - benzene + nitrous oxide --> phenol + nitrogen
phenol
Phenol is flammable.
All laundry detergents are not eco friendly. Eco-Friendly usually contain natural ingredients. The harmful laundry detergents contain bleach or phenol.