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Why is Ortho nitro phenol are more acidic than ortho methoxy phenol?
Wiki User
∙ 10y ago
acid strength is-
p-nitrphenol>o-nitrophenol>m-nitrophenol
nitro group has both -R effect and -I effect but -M effect prdominates over -I effect ...-No2 group at o and p position withdraws electron of o-h bond towards it by stronger -R effect while the No2 group at m position withdraws electron of o-h bond by weaker -I effect ....thus o and p nitrophenols are more acidic than m- nitrophenol...
however o- nitrophenol is little less acidic than p-nitrophenol due to intramolecular h-bonding which makes loss of proton little more difficult..........so para nitrophenol is strongest....
Wiki User
∙ 11y ago
Wiki User
∙ 10y agophenol loses a proton to form phenoxide ion (reason for acidity of phenols).
When electron withdrawing groups such as nitro, cyano, carbonyl etc are present on the aromatic ring, the stability of the phenoxide ion increases, the equilibrium shifts to the right. In other words, more protons are formed and the acidity increases.
An opposite trend is observed when an electron donating group such as methyl, methoxy etc are present.
Wiki User
∙ 14y agoit is not.o-nitrophenol is steam volatile not p-nitrophenol.
Wiki User
∙ 12y agoIntrmolecular hydrogen bonding
Wiki User
∙ 11y agoBecause God made it that way
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Which is more acidic ortho-nitro benzoic acid or ortho-methoxy benzoic acid?
orho methoxy benzoic acid is more acidic due to stability achieved due to chelation effect.
Do ortho nitro phenol and para nitro phenol have hydrogen bonding in their molecules?
Otho nitro phenols have intra cellular H bonds.Para nitro phenols have inter cellular H bonds.
Why nitro group is formed on ortho and para position?
orientation of incoming Nitro group is destined by already present group on benzene ring . if already present group is electron donating group, it will promote electron density at ortho and para position and , therefore, nitro group is formed on ortho and para position.
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.
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
Which is more acidic ortho-nitro benzoic acid or ortho-methoxy benzoic acid?
orho methoxy benzoic acid is more acidic due to stability achieved due to chelation effect.
Do ortho nitro phenol and para nitro phenol have hydrogen bonding in their molecules?
Otho nitro phenols have intra cellular H bonds.Para nitro phenols have inter cellular H bonds.
Why para-nitro acetanilide is insoluble in water whereas ortho-nitro acetanilide is soluble in water?
p-nitro phenol has a symmetric structure as compare to o-nitro phenol so it has higher dipole moment or polarity so is more soluble.
Which is more acidic phenol or para-chloro phenol?
Phenol. Anisole doesn't have any acidic protons.
How do you separate ortho and para nitro phenol?
by steam distillation as o-nitrophenol is volatile due to intra-molecular hydrogen bonding, SYNCRO, GKP
Why nitro group is formed on ortho and para position?
orientation of incoming Nitro group is destined by already present group on benzene ring . if already present group is electron donating group, it will promote electron density at ortho and para position and , therefore, nitro group is formed on ortho and para position.
What is more polar 4-nitrophenylaceto nitrile or -nitrophenylacetic acid?
4-nitrophenol is more polar than phenol by the inductive effect. NO2 has a dipole that pulls electrons away from the oxygen on hydoxyl group, thus increasing the polarity between H+ and O-. It also makes phenol more acidic, as the phenol hydrogen can come off a lot more easier. On a side note, the position of the nitro group also plays in polarity. When it is placed in the 3-position (meta), the nitro group can now participate in resonance with the benzene ring, whereas position 2+4 (ortho and para, respectively) can't break bonds to participate in resonance. Therefore, the polarity and acidity would increase in this manner: phenol > 4-nitrophenol > 2-nitrophenol > 3-nitrophenol.
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.
Why ortho benzoic acid is more acidic than para osomer?
Nitro group (-NO2), having -I and -R effect, is an electron withdrawing and deactivating group. Due to both these effects, it decreases electron density around the -COOH group of substituted(ortho, meta & para) benzoic acids and releases H+ ions, making these acidic. The nitrobenzoic acid which releases H+ group more easily is the most acidic. Due to ortho effect, ortho acids are more acidic than all other substituted acids(even if an electron donating group is present at the ortho position. The only exception is -NH2 group, in which ortho- aminobenzoic acid is NOT the strongest acid). Regarding acidity of meta and para acids, consider I and R effects. Inductive effects of meta and para acids reduce electron density around -COOH group, whereas resonance does not occur at meta position. It only occurs at para position, making the nitro group at para position a more strong withdrawer of electrons. Thus para-nitro benzoic acid is more acidic than meta-nitro benzoic acid. In short, the higher acidity of p-nitrobenzoic acid compared to m-nitrobenzoic acid is attributed to its -I and -R effect.
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 do you convert chloro benzene to p-nitro phenol?
I'd do it this way. Use Dow's Process (NaOH) to convert chlorobenzene to phenol. Now, use nitrating mixture to get both o and p- nitrophenol. Fractional distillation should give you what you finally need.
How picric acid is strong acid?
for three electron withdrawing nitro groups, picric acid is highly acidic
