# How can I draw the following amides: N-ethylbutanamide, N-propylpentanamide, N,3-dimethylhexanamide?

Aug 11, 2015

You draw the base structure, then you add the substituents in the appropriate locations.

1. N-Ethylbutanamide

The base name tells you that this molecule has a four-carbon chain with an amide group.

Its skeleton structure is ${\text{C-C-C-CONH}}_{2}$.

The carbonyl group is automatically $\text{C-1}$.

A substituent on the $\text{N}$ atom is indicated by the prefix N-.

In this case, we have an ethyl group on the $\text{N}$ atom, so the structure is

(from www.on-select.com)

2. N-Propylpentanamide

Here, we have a five-carbon amide with a propyl group on the $\text{N}$ atom.

The structure is

(from opsin.ch.cam.ac.uk)

3. N,3-Dimethylhexanamide

Here, we have a six-carbon amide with one methyl group on the $\text{N}$ atom and another methyl group on $\text{C-3}$ of the main chain.

The structure is

(from opsin.ch.cam.ac.uk)