Question

Number of possible amides with the formula $C_3{H}_{7}NO$ is/are:

Answer 1

Hint: The answer lies in the fact that amides cannot bind directly to the oxygen as it does not become a group but only carbon or hydrogen atoms can be directly attached. Based on this fact answers can be guessed.


Complete answer:
In our chapters in the organic chemistry part about the naming of organic compounds based on the IUPAC rules and also the common names assigned to them.
We have also come across the predictions of possible structure for the given molecular formula.
Now, let us go through some of the basics to assign the structure for the compound as per the given molecular formula.
We know that molecular formula does not give any information of the arrangement of atoms in a plane and therefore for the given question above, there is a mention of ‘amides’ which has the general formula as,

This shows that the amide group has amine group attached to the carbonyl group which is further linked to alkyl or aryl group denoted by ’R’ where the hydrogens in $-N{H}_2$ can be replaced with other methyl or ethyl groups.
Based on these facts and the data given we can therefore assign some of the structures accordingly as shown below,

Therefore, the correct answer is there are four possible structures of amides given for the molecular formula $C_3{H}_{7}NO$.

Note: Note that the possible structures for the compounds can be given if you are thorough with the names of the functional groups in the common name given so that you can easily understand which atoms are interlinked together.