Question

$- CON{H_2}$ is the representation of:
A. primary amide
B. secondary amide
C. tertiary amide
D. none of these

Answer 1

In organic chemistry, an amide, also known as an organic amide or a carboxamide, is a compound with the general formula , where $R,{\text{ }}R'$ and represent organic groups or simply the hydrogen atoms. The amide group is called a peptide bond when it is part of the main chain of a protein, and an isopeptide bond when it occurs in a side chain.

Complete step by step answer:
Amides are qualified as primary, secondary and tertiary according to whether the amine subgroup has the form $-N{H_2}, - NHR$ or $-NRR'$, where $R$ and $R'$ are groups other than hydrogen.
The common form of amide in which it is written is . In this chemical formula, when the substituents attached to the nitrogen atom are varied, the degree of the amide also varies. Thus, we can say that when both the $R$ and $R'$ groups are replaced by hydrogen atoms, the type of amide is the primary amide. The resultant functional group that is formed is $- CON{H_2}$.
Thus, the correct option is A. primary amide.

Note: In the usual nomenclature, one adds the term "amide" to the stem of the parent acid's name. For example, the amide which is derived from the acetic acid is named as acetamide ($C{H_3}CON{H_2}$ ). According to the IUPAC, the name should be ethanamide, but this and related formal names are rarely encountered. When the amide is derived from a primary or secondary amine, the substituents on nitrogen are indicated first in the name. Thus, the amide formed from dimethylamine and acetic acid is N,N-dimethylacetamide ($C{H_3}CONM{e_2}$ , where $Me{\text{ }} = {\text{ }}C{H_3}$ ).