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Why 2 4 6 trinitro phenol is termed as Picric acid however it does not contain COOH group?
Wiki User
∙ 12y ago
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).
Wiki User
∙ 12y ago
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How to convert aniline to picric acid?
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).
Is phenol volatile?
Phenol is flammable.
What are some examples of a phenol?
What are some examples of Phenol
Does phenol react with bromine?
Yes, at room temperature bromine reacts with phenol and forms 2,4,6-tribromo phenol.
Which is strong acid water or phenol?
Both water and phenol are very weak acids. Though phenol is the stronger of the two.
Why is picric acid is more acidic than phenol?
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.
How to convert aniline to picric acid?
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).
In real picric acid is not acid..then why it called acid?
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'.
How will you convert phenol to 246 trinitrophenol?
very easy, a single step reaction. When phenol is heated with Concentrated Nitric acid 2,4.6-trinitrophenol (Picric acid) is produced.
Why direct nitration is used in picric acid?
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
What is the only organic acid without COOH group?
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
How can phenol be converted to aspirin?
you can say as it contain Phenol ring that is undergoes acetylation process to form -OCOCH3
Does Ibuprofen contain a phenol group?
No. An OH group is not attached to the benzene ring.
How will you synthesis of phenol in small scale'?
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
Structure of phenol?
phenol
Is phenol volatile?
Phenol is flammable.
Are laundry detergents eco-friendly?
All laundry detergents are not eco friendly. Eco-Friendly usually contain natural ingredients. The harmful laundry detergents contain bleach or phenol.
