Bond Angle Strain vs. Torsional Strain

Moderators: Chem_Mod, Chem_Admin

jyc185
Posts: 8
Joined: Fri Sep 20, 2013 3:00 am

Bond Angle Strain vs. Torsional Strain

Postby jyc185 » Sun Feb 28, 2016 12:42 am

What is the exact difference between a bond angle strain and a torsional strain? I'm having a hard time grasping the two ideas.

Jonathan Shih 3H
Posts: 37
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond Angle Strain vs. Torsional Strain

Postby Jonathan Shih 3H » Sun Feb 28, 2016 11:33 am

Hey,

I'm not sure we need to know this distinction since it seems like this is 14C material, but here's a UCLA resource (I think it's actually from Hardinger's class) that could help clarify the distinction between the two types of strains. http://www.chem.ucla.edu/harding/notes/strain_02.pdf

Hope the reference helps!

Shrita Pendekanti 4B
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond Angle Strain vs. Torsional Strain

Postby Shrita Pendekanti 4B » Fri Mar 04, 2016 3:31 pm

Torsional strain is caused by electron repulsion between neighboring atoms while bond angle strain is caused when bond angles disagree with the ideal orientation of the molecule. Hope this helps!

zhajee
Posts: 23
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond Angle Strain vs. Torsional Strain

Postby zhajee » Fri Mar 04, 2016 6:48 pm

Does torsional strain always have to occur between two atoms orthogonal to each other?

chemgal4L
Posts: 19
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond Angle Strain vs. Torsional Strain

Postby chemgal4L » Sat Mar 05, 2016 4:58 pm

what exactly does orthogonal to each other mean..?

Elsa Calzada 3E
Posts: 9
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond Angle Strain vs. Torsional Strain

Postby Elsa Calzada 3E » Sat Mar 05, 2016 5:42 pm

On Wednesday's lecture, Dr. Lavelle mentions an additional strain "when atoms are physically bumping into each other" how does this relate to the torsional strain?

Shaye Busse 3B
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond Angle Strain vs. Torsional Strain

Postby Shaye Busse 3B » Sun Mar 06, 2016 9:25 pm

When atoms are physically bumping into each other, this is a different kind of strain called steric strain. This in addition to torsional and bond angle strain will make up the difference in potential energy from one conformation to another.

Shirley Wong 2E
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond Angle Strain vs. Torsional Strain

Postby Shirley Wong 2E » Sun Mar 06, 2016 10:45 pm

Does all eclipsed molecules have torsional strain?

Megan FitzPatrick 1C
Posts: 17
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond Angle Strain vs. Torsional Strain

Postby Megan FitzPatrick 1C » Mon Mar 07, 2016 7:57 pm

I am pretty sure the answer is yes, as long as the molecule is made up of neighboring carbons with hydrogens that eclipse (overlap in space).


Return to “*Cyclopropanes and Cyclobutanes”

Who is online

Users browsing this forum: No registered users and 1 guest