Rationalised 2023-24
210
Chemistry
Strong oxidising agents such as acidified potassium
permanganate are used for getting carboxylic acids from alcohols
directly CrO3 in anhydrous medium is used as the oxidising agent
for the isolation of aldehydes 3
2
CrO
R H
R
C
OH
CHO

A better  reagent for oxidation of primary alcohols to aldehydes in
good yield is pyridinium chlorochromate (PCC), a complex of
chromium trioxide with pyridine and HCl 3
2
3
PCC
O
CH
CH
CH
H
CH
CH
O
CH
CH
CH








Secondary alcohols are oxidised to ketones by chromic anhyride
(CrO3)