Chemical Properties of alcohols
Reactions of alcohols involving cleavage of O-H bond
• Reaction with metals:
• Reaction with carboxylic acid (Esterification):
• Reaction with Grignard reagent:
Reactions involving cleavage of C – O bond
For the reaction involving cleavage of C – O bond, the reactivity order is
• Formation of halides:
Oxidation of alcohols
Depending upon the structure of the alcohol and the type of oxidising agent used, oxidation of alcohol gives different products.
Dehydrogenation of alcohols
Dehydration of alcohols takes place in acidic medium. Intra-molecular dehydration leads to the formation of alkene while inter molecular dehydration forms ether.
Order of ease of dehydration is: 3° > 2° > 1°
Dehydration of alcohols
Dehydration of alcohols with conc. H2SO4 at different temperatures yields different products.
The ease of dehydration of three alcohols increases in the order
10 ROH < 20 ROH < 30 ROH