Question

The IUPAC name of the compound, $ {{C}_{2}}{{H}_{5}}NHCOC{{H}_{3}} $ is:

• A. N-acetyl emanamme
• B. n-ethanoyl ethanamine
• C. N-ethyl-N-methyl acetamide.
• D. all of the above

Answer 1

The Correct Option is C

The correct option is(B): N-ethyl-N-methyl acetamide.

The given compound C2​H5​NHCOCH3​ can be broken down into its constituent parts:

1. C2​H5​ represents an ethyl group.
2. NHCOCH3​ represents a functional group consisting of an amide group (NHCO) attached to a methyl group (CH3​).

When naming this compound according to IUPAC nomenclature, we follow these steps:

Identify the longest carbon chain containing the functional groups. In this case, there is only one carbon atom, so it's not a chain.

Identify and name the substituents (groups) attached to the carbon chain.

• The ethyl group (C2​H5​) is a substituent.
• The NHCOCH3​ group is also a substituent. We can name it as "N-methyl ethanamide."

Combine the substituent names in alphabetical order, along with the main functional group name. Use hyphens to separate the names.

Applying these steps:

• The substituent "ethyl" comes before "methyl" alphabetically.
• The main functional group is an amide, so we use the suffix "-amide."

Combining these, we get the IUPAC name as "N-ethyl-N-methyl ethanamide."

However, it seems that there might be a slight typo in the answer you provided. The correct answer should be "N-ethyl-N-methyl acetamide" instead of "N-ethyl ethanamide." The functional group NHCOCH3​ corresponds to an acetamide group, not a simple amide. The "acetamide" part comes from the acetate structure (CH3​CO−).

So, the correct IUPAC name is "N-ethyl-N-methyl acetamide."