Table of Contents
- 1 Which is more acidic phenol or m cresol?
- 2 Is phenol the strongest acid?
- 3 Which cresol is most acidic?
- 4 Why is phenol more reactive than benzene?
- 5 Why are phenols weaker acids than carboxylic acids?
- 6 Why does the acidity of all cresols decrease with respect to phenol?
- 7 Why is -CH3 more stable than phenol and CH3?
Which is more acidic phenol or m cresol?
The classic explanation of the cresol is that a methyl should provide a positive inductive effect (which is +I) to the ring. They increase the negative charge on phenolate oxygen, consequently making all the cresols less acidic compared to phenol.
Is phenol the strongest acid?
Phenol is a very weak acid and the position of equilibrium lies well to the left. Phenol can lose a hydrogen ion because the phenoxide ion formed is stabilised to some extent. The negative charge on the oxygen atom is delocalised around the ring. The more stable the ion is, the more likely it is to form.
Why phenol is stronger acid than alcohol?
Phenols are much more acidic than alcohols because the negative charge in the phenoxide ion is not localized on the oxygen atom, as it is in an alkoxide ion, but is delocalized-it is shared by a number of carbon atoms in the benzene ring.
Why is meta cresol more acidic than ortho cresol?
m-cresol is the more acidic than p-cresol because in ortho and para isomers, hyperconjugative effects of -CH3 group lead to an increase in electron density on the oxygen atom.
Which cresol is most acidic?
3) Now let’s discuss the given structures, m-cresol is most acidic as the electron-donating group methyl is at meta position which is far from the ortho position. The structure p-cresol shows the positive inductive effect as well as the hyperconjugation effect.
Why is phenol more reactive than benzene?
The increased reactivity compared to benzene is due to the lone pair of p-orbital electrons on the oxygen atom in the phenol group. The electron pair is delocalised into the ring structure, activating the ring. This increases the electron density of the molecule, which induces dipoles in the bromine molecule.
Is phenol stronger than carbonic acid?
We can easily observe that carbonic acid forms bicarbonate ion and phenol forms phenoxide ion after losing H+ ion. Bicarbonate ions have two and phenoxide ions have four resonance structures. We can conclude that phenol is an acid weaker than carbonic acid.
Which phenol is strongest?
p-nitro phenol
Acidic strength of phenol is enhanced by the presence of electron- withdrawing groups which stabilized the phenoxide ion. Due to the presence of strong electron- withdrawing group – NO2(-I,-R), p-nitro phenol is the strongest acid.
Why are phenols weaker acids than carboxylic acids?
The carboxylate ion formed is stabilized through resonance by effective delocalization of the negative charge. Therefore, the carboxylate ion exhibits higher stability in comparison to phenoxide ion. Hence, the carboxylic acids are more acidic than phenols.
Why does the acidity of all cresols decrease with respect to phenol?
Now, due to +I effect and hyper conjugative effect of methyl group , the density of electron towards oxygen atom increases. As a result , a repulsion force acts among the electrons. Hence the acidity of all the cresol decreases with respect to phenol. Why m-cresol is more acidic than o-cresol?
Is cresol an acid or a base?
Cresol has an electron donating methyl group, which reduces its electron deficiency of the phenol group and hence acidity. The methyl group has +I effect as well as hyperconjugation effect, both of which increase the electron density in the O-H bond, and hence all cresols are weaker acids than phenol.
Is phenol acidic or basic or neutral?
So phenol is acidic in nature. It is not a base. Which is stronger acid phenol or cresol? There are three type of cresol such as o-cresol, m-cresol and p-cresol. They are all positional isomers to each other . Each of them contains one methyl group.
Why is -CH3 more stable than phenol and CH3?
Since -CH3 is an Electron Donating group and has +I effect it decreases the density on the O atom thereby decreasing the acidity. Phenol is a weak acid but stronger than the previous two because it can be deprotonated due to Resonance hence it could be stable.