Question

Upon oxidation with reagent X, 2-methylpropane-1,2-diol gives 2-hydroxy-2-methyl-propanal. Identify X​

Answer 1

Answer:

90.10 is written in ff gun

Answer 2

Upon oxidation with reagent X, 2-methylpropane-1,2-diol gives 2-hydroxy-2-methyl-propanal. Hence reagent X is Pyridinium Chlorochromate (PCC).

• In the conversion of 2-methylpropane-1,2-diol to 2-hydroxy-2-methyl propanal, the conversion happening is on $C_{1}$ of the compound.
• In the first compound $C_{1}$ of propane has an -OH group attached to it (alcohol). After being made to react with X, $C_{1}$ has an aldehyde group(−CHO) attached to it.
• Therefore, the conversion is from alcohol to aldehyde group.
• The reagent most suitable for this conversion is Pyridinium Chlorochromate or PCC.
• PCC is most widely used for converting primary alcohols to aldehydes as it is a mild oxidising agent and hence will not affect the alcohol group on $C_{2}$ of the first compound.

Therefore, reagent X in this conversion is Pyridinium Chlorochromate (PCC).