Question

Which of the following compounds gives secondary amine on reduction?
(A) Alkyl Nitrite
(B) Carbylamines
(C) Alkyl Cyanide
(D) Secondary nitro compounds

Answer 1

Hint: Two organic substituents (alkyl, aryl, or both) are bonded to the nitrogen together with one hydrogen in secondary amines. Dimethylamine is a significant representation, while diphenylamine is an example of an aromatic amine. On reduction, cabylamine or isocyanides produce secondary amine.

Complete Step by Step Solution:
When something is reduced, oxygen is lost or hydrogen is gained. A redox reaction is one that involves simultaneous reduction and oxidation. Reducing agents take oxygen away from another substance whereas oxidising agents add oxygen.

A compound's primary, secondary, or tertiary status depends on how many carbons are linked directly to the nitrogen atom. One carbon is linked to the nitrogen in primary amines. Tertiary amines have three carbon atoms linked to the nitrogen, whereas secondary amines have two.

Inorganic synthesis and medicinal chemistry require the production of carbon-nitrogen bonds, which is where secondary amines come into play. Enamine provides over 20,000 secondary amines from stock, ranging from simple scaffolds for library synthesis through intermediates and small decorative building components.

Now, for this question we need to understand that we have some very common ways for production of secondary amines. One of them is that if we have a keto oxime i.e., we have taken a ketone, say, acetone and hydroxylamine, the oxime obtained here is keto oxime with the release of ${H_2}O$ .

If we further reduce this keto oxime in presence of sodium and ethanol $\left( {Na/{C_2}{H_5}OH} \right)$ , we get a ${2^ \circ }$ amine that we call secondary amine.
Another way is suppose that we take any isocyanide with addition of hydrogen (since addition of hydrogen is reduction), reduction takes place and we obtain an amine which is secondary amine.
So this way we can obtain a secondary amine in different ways.
Hence, B. is the correct option.

Note: A compound that belongs to the imine family of chemicals is called an oxime, and its standard formula is\[RR'C = NOH\] , where R is an organic side-chain and R' can either be hydrogen to make an aldoxime or another organic group to form a ketoxime.