Aldehydes Ketones Question 29
Question: The most suitable reagent for the conversion of $ RCH_2OH\to RCHO $ is
[AIIMS 2004]
Options:
A) $ KMnO_4 $
B) $ K_2Cr_2O_7 $
C) $ CrO_3 $
D) PCC (Pyridine chloro chromate)
Show Answer
Answer:
Correct Answer: D
Solution:
The alcohol can be converted to aldehyde group by treating with oxidising agent Pyridinium chloro chromate $ (C_6H_5\overset{\oplus }{\mathop{N}}HCrO_3C{l^{-}}) $ it is abbreviated as PCC and is called Collin’s reagent. This reagent is used in non aqueous solvent like $ CH_2Cl_2 $ It is a very good reagent because it checks the further oxidation of aldehyde to carboxylic acid while rest oxidising agent oxidise aldehyde into carboxylic acid.
BETA
