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प्रश्न
Write the equation involved in the following reaction:
Kolbe’s reaction
Explain the following with an example.
Kolbe’s reaction
उत्तर
Phenoxide ion generated by treating phenol with sodium hydroxide is even more reactive than phenol towards electrophilic aromatic substitution. Hence, it undergoes electrophilic substitution with carbon dioxide, a weak electrophile. Ortho hydroxybenzoic acid is formed as the main reaction product.
संबंधित प्रश्न
Write the main product(s) in each of the following reactions:
Explain the following with an example.
Kolbe’s reaction.
Write the reaction involved in the following:
Friedal-Crafts Alkylation of Phenol
When phenol is treated with excess bromine water, it gives:
Which of the following species can act as the strongest base?
Which of the following are used to convert \[\ce{RCHO}\] into \[\ce{RCH2OH}\]?
(i) \[\ce{H2/Pd}\]
(ii) \[\ce{LiAlH4}\]
(iii) \[\ce{NaBH4}\]
(iv) Reaction with \[\ce{RMgX}\] followed by hydrolysis
Convert the following:
Phenol to N-phenylethanamide.
Which of the following is not aromatic?
Attacking species in nitration of benzene in presence of fuming HNO3 is
Write the equations for the following reaction:
Phenol is treated with chloroform in the presence of NaOH
Why ortho-nitrophenol is steam volatile while para-nitrophenol is not?
For the pair phenol and cyclohexanol, answer the following:
Give one chemical test to distinguish between the two.
How can phenol be prepared from anisole? Give reaction.
Convert the following by giving a chemical equation:
Phenol to salicylaldehyde.
