4-Nitrobenzaldehyde
4-Nitrobenzaldehyde is an organic compound with the formula. It is one of three isomers of nitrobenzaldehyde. It contains a nitro group para-substituted to an aldehyde.
4-Nitrobenzaldehyde is obtained by oxidation of 4-nitrotoluene or hydrolysis of 4-nitrobenzalbromide:
In the laboratory, the oxidation is achieved with chromium(VI) oxide in acetic anhydride, which affords nitrobenzyldiacetate.