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

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Answer 1 · 2015-08-11T16:49:59

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 #"C-C-C-CONH"_2#.

The carbonyl group is automatically #"C-1"#.

A substituent on the #"N"# atom is indicated by the prefix N-.

In this case, we have an ethyl group on the #"N"# atom, so the structure is

2. N-Propylpentanamide

Here, we have a five-carbon amide with a propyl group on the #"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 #"N"# atom and another methyl group on #"C-3"# of the main chain.

The structure is

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