Steric Strain

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Cheng-Wei Jan
Posts: 11
Joined: Fri Sep 25, 2015 3:00 am

Steric Strain

Postby Cheng-Wei Jan » Fri Mar 11, 2016 11:08 pm

Can someone please explain the idea behind steric strain and how it differs from torsional stain?

Lauren Garcia 3I
Posts: 13
Joined: Fri Sep 25, 2015 3:00 am

Re: Steric Strain

Postby Lauren Garcia 3I » Fri Mar 11, 2016 11:18 pm

Steric strain occurs when atoms/atom groups repel each other because they are unable to occupy the same location. The difference between steric strain and torsional strain, though they both have to do with atoms being adjacent to each other, is that torsional strain is a force that opposes rotation of a molecule about a bond, whereas steric strain has to do with repulsion between electrons in atoms that are not directly bonded to each other.

Dianna Grigorian 1C
Posts: 72
Joined: Wed Sep 21, 2016 2:55 pm

Re: Steric Strain

Postby Dianna Grigorian 1C » Fri Mar 10, 2017 2:47 pm

Sterin strain occurs when the atoms physically bump into each other. It happens when nonbonded atoms interact with each other and are too close. Torsional strain is the force that oppose rotation of a part of a molecule about a bond. In other words, it is the electron density repulsion that limits the molecule from rotating.

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