cleavage of O-H bond so reaction reactivity order
Answers
Esterification
Alcohols react with carboxylic acid in the presence of conc. H2SO4 or dry HCl to form esters.
Esterification of alcohols
Due to resonance, phenols do not undergo this reaction.
Acylation
Alcohols react with acid chlorides (R−COCl) and acid anhydrides [(R−CO)2O] to form esters.
Acylation of alcohols
If the acid chloride or acid anhydride used is acetyl chloride (CH3COCl) or acetic anhydride [(CH3CO)2O] , the reaction is usually termed as acetylation. However, if benzoyl chloride (C6H5COCl) is used, the reaction is termed as benzoylation.
Phenols also undergo the reaction in the presence of base catalyst such as pyridine.
acylation in phenol requires pyridine as catalyst
In case of acetic anhydride, either acids (conc. H2SO4) or base (pyridine etc.) are used as catalysts.
acylation in phenol requires pyridine as catalyst
Schotten-Baumann reaction
Phenols react with benzoyl chloride in the presence of aqueous NaOH to form phenylesters. This reaction is called Schotten-Baumann reaction.
Schotton-Baumann reaction : Phenol reacts with benzoyl chlorides to form phenylesters
Reaction with Grignard reagents
Both alcohols and phenols react with Grignard reagents to form alkanes. The alkane thus formed corresponds to the alkyl group of the Grignard reagents.
Alkanes corresponding to grignard reagents are formed when grignard reagents react with alcohols and phenols
Example
Alkanes corresponding to grignard reagents are formed when grignard reagents react with alcohols and phenols
Example
Alkanes corresponding to grignard reagents are formed when grignard reagents react with alcohols and phenols