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Why 2 4 6 trinitro phenol is termed as Picric acid however it does not contain COOH group?
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).
What else can I help you with?
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).
What household products contain phenol?
Some household products that contain phenol include disinfectants, antiseptics, and some cleaning products. These products may list phenol as an active ingredient on the label. It is important to follow usage instructions and safety precautions when using products containing phenol.
Does paracetamol contain a phenol group?
Yes, paracetamol (acetaminophen) contains a phenol group in its chemical structure. This phenol group is responsible for its analgesic and antipyretic properties.
What are some examples of a phenol?
Some examples of phenols include phenol itself (hydroxybenzene), cresol, guaiacol, and catechol. These compounds contain a hydroxyl group attached to a benzene ring.
What items contain phenol?
Phenol is commonly found in disinfectants, personal care products, and certain medications. It can also be present in coal tar derivatives, plastics, and pesticides.
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).
How will you convert phenol to 246 trinitrophenol?
To convert phenol to 2,4,6-trinitrophenol (picric acid), you would first nitrate phenol by treating it with a mixture of nitric and sulfuric acids. This will lead to the substitution of hydrogen atoms on the phenol ring with nitro groups, resulting in the formation of the 2,4,6-trinitrophenol compound.
What happens when phenol reacts with concentrated HNO3 plus H2SO4?
When phenol reacts with concentrated nitric acid (HNO3) in the presence of sulfuric acid (H2SO4), a mixture of products is formed, including picric acid (2,4,6-trinitrophenol) and water. This reaction is known as nitration of phenol and is used to synthesize picric acid, which is a yellow, explosive compound.
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'.
Phenol when it first reacts with conc sulfuric acid and then with conc nitric acid gives?
Phenol reacts with concentrated sulfuric acid to form the sulfonated product, and then with concentrated nitric acid to form picric acid (2,4,6-trinitrophenol).
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
How can phenol be converted to aspirin?
you can say as it contain Phenol ring that is undergoes acetylation process to form -OCOCH3
What household products contain phenol?
Some household products that contain phenol include disinfectants, antiseptics, and some cleaning products. These products may list phenol as an active ingredient on the label. It is important to follow usage instructions and safety precautions when using products containing phenol.
Does paracetamol contain a phenol group?
Yes, paracetamol (acetaminophen) contains a phenol group in its chemical structure. This phenol group is responsible for its analgesic and antipyretic properties.
Why is picric acid is called a acid?
Picric acid is a fairly strong acid. Most phenols are very weak acids, although they do react with strong bases. Since picric acid (2,4,6-trinitrophenol) has three strong electron-withdrawing nitro groups on its ring, its anion is more stable than most phenolates, and that makes it a much stronger acid.
What are some examples of a phenol?
Some examples of phenols include phenol itself (hydroxybenzene), cresol, guaiacol, and catechol. These compounds contain a hydroxyl group attached to a benzene ring.
