Question

An organic compound gives hydrogen an
Reaction with sodium metal. It forms an
Aldehyde with molecular formula
C2H4O on oxidation with pyridinium
chloro chromate: Give the chemical equa-
tions in support of these observations.
Explain the fact that in alkyl aryl ether,
alkoxy group is ring activating and ortho/
para directing towards elestrophilic
aromatic substitution.​

Answer 1

Explanation:

Solution. Ethyl alcohol gives hydrogen on reaction with sodium metal. On oxidation with PCC ethanol will form acetalde

hyde (C2H4O).

In aryl alkyl ethers, due to the +R effect of the alkoxy group, the electron density in the benzene ring increases as shown in the following resonance structure. Thus, benzene is activated towards electrophilic substitution by the alkoxy group.