Confused about amides?? (1 Viewer)

[HSCya1234567]

What's going on in the diagram below? I read the dotpoints but I'm a little confused why the double bond changes place. Do we need to know this? My Textbook doesn't really talk about it.

All You Need to Know About Amines & Amides | HSC Chemistry

This is part of the HSC Chemistry course under the topic Reactions of Organic Acids and Bases. HSC Chemistry Syllabus investigate the structural formulae, properties and functional group including: amines and amides explain the properties within and between the homologous series of carboxylic...

scienceready.com.au

 

[HSCya1234567]

Can someone also explain why amides have higher BPs than carboxylic acids?

 

[indeed]

Can someone also explain why amides have higher BPs than carboxylic acids?

I haven't heard of the first post you sent, but for the BP Q:
Amides can H-bond through C=O, C-N and 2 N-Hs
Carboxylic acids can only on C=O, C-O and 1 O-H

Hence amides have more sites for H-bonding

 

[HSCya1234567]

I haven't heard of the first post you sent, but for the BP Q:
Amides can H-bond through C=O, C-N and 2 N-Hs
Carboxylic acids can only on C=O, C-O and 1 O-H

Hence amides have more sites for H-bonding

perfect then i wont worry about the first thing

with the carboxylic acid why cant the Hs on the CH3 hydrogen bond as well?

 

[HSCya1234567]

WAIT NO GOT IT sorry forgot mod 1 there for a min

 

[wizzkids]

What's going on in the diagram below? I read the dotpoints but I'm a little confused why the double bond changes place. Do we need to know this? My Textbook doesn't really talk about it.

Resonance structures in Chemistry refers to bonding electrons moving rapidly between positions of roughly equivalent potential energy. So if there are two structural isomers that differ only in the position of a double bond (as in the amide that you mentioned) then both structures are equally probable, and both structures will actually exist. This flipping around of bonding electrons does actually make the molecule more stable. The benzene ring is the most famous example of a resonance structure in organic Chemistry. That's about as much as you will ever need to know about resonance structures for HSC Chemistry.