Cresols, for example, are less acidic than phenol The greater the pKa
value, the weaker the
acid Rationalised 2023-24
208
Chemistry
Pyridine
R/Ar
+R’
l
OH
COC
R/ArOCOR + HCl
’
The reaction with carboxylic acid and acid anhydride is carried
out in the presence of a small amount of concentrated sulphuric
acid The reaction is reversible, and therefore, water is removed as
soon as it is formed