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प्रश्न
Ortho and para nitrophenols are more acidic than phenol. Draw the resonance structures of the corresponding phenoxide ions.
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उत्तर
Resonance structures of o-nitrophenoxide ion
Resonance structures of p-nitrophenoxide ion
Resonance structures of phenoxide ion
In substituted phenols, electron-withdrawing groups such as the nitro group increase the acidic strength of phenol. This effect becomes more potent when such groups are present at the ortho and para positions. This is because of the effective delocalisation of the anion of the phenoxide ion. Hence, o- and p-nitrophenols are more acidic than phenol.
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संबंधित प्रश्न
Write the final product(s) in each of the following reactions:
Write the mechanism of the following reaction:
Write the mechanism of the following reaction :
Name the reagent used in the following reaction:
Oxidation of a primary alcohol to carboxylic acid.
Lucas reagent is ____________.
Lucas test is used for the detection of _____________.
In the reduction \[\ce{R - CHO + H2 -> RCH2OH}\] the catalyst used is:
By which of the following methods alcohol can be prepared in excellent yield?
Which of the following are used to convert RCHO into RCH2OH?
(i) H2/Pd
(ii) LiAlH4
(iii) NaBH4
(iv) Reaction with RMgX followed by hydrolysis
Dehydration of 2-butanol yields:
Lucas test is done to differentiate between ____________.
The process of converting alkyl halides into alcohols involves ______.
Mark the correct increasing order of reactivity of the following compounds with HBr/HCl.
| (a) |  |
| (b) |  |
| (c) |  |
Explain why nucleophilic substitution reactions are not very common in phenols.
Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tert-butyl ether can’t be prepared by this method. Explain.
Which of the following observation is shown by 2-phenyl ethanol with Lucas Reagent?
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
