Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum

Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum (http://www.molecularstation.com/forum/)
-   Peptide Forum (http://www.molecularstation.com/forum/peptide-forum/)
-   -   Why do we not see rotation in the peptide bond between the carbonyl carbon and (http://www.molecularstation.com/forum/peptide-forum/87568-why-do-we-not-see-rotation-peptide-bond-between-carbonyl-carbon.html)

Nadina 02-14-2013 03:18 PM

Why do we not see rotation in the peptide bond between the carbonyl carbon and
 
amide nitrogen? Why do we not see rotation in the peptide bond between the carbonyl carbon and amide nitrogen?

a)Because it is a double bond
b)Because it is a single bond
c)Because of bond resonance
d)Because it is a covalent bond
e)Because of hydrogen bonding

Kunal Pandya 04-03-2013 09:16 AM

Re: Why do we not see rotation in the peptide bond between the carbonyl carbon and
 
c)Because of bond resonance

cspeptide 04-17-2013 09:27 AM

Re: Why do we not see rotation in the peptide bond between the carbonyl carbon and
 
Resonance is the reason why:
Peptide bonds are really made up of 2 resonance contributing structures
1) O=C-N
2) O-C=N
(both Cs are attached to C(alpha))

Just think of it as both bonds having a partial double bond properties.
If you built the models using double bonds you would notice that the whole structure would be planar at that bond and would not allow for rotation due to overlapping orbitals.


All times are GMT. The time now is 05:12 PM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 - 2012 Molecular Station | All Rights Reserved

Page generated in 0.08987 seconds with 11 queries