steric and torsional strain

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Stephanie_Martinez3E
Posts: 9
Joined: Wed Sep 21, 2016 2:58 pm

steric and torsional strain

Postby Stephanie_Martinez3E » Mon Mar 13, 2017 9:31 pm

What is the difference between torsional and steric strain?

Ashley_Thomas_3C
Posts: 20
Joined: Wed Sep 21, 2016 2:56 pm

Re: steric and torsional strain

Postby Ashley_Thomas_3C » Mon Mar 13, 2017 9:54 pm

Torsional strain is the repulsion caused by the electrons in between different groups
when they pass by each other, when rotating a molecule around a bond. So torsional strain can be thought as the repulsion due to electrostatic forces between electrons in adjacent molecular orbitals. On the other hand, steric strain is strain caused by the electrons in between different groups and cannot be decreased by rotating the molecule around a bond. Steric strain can be thought of as repulsion when two bulky groups which are not directly bonded to each other become too close to each other and hence there isn't enough space for them.

Minu Reddy
Posts: 31
Joined: Sat Jul 09, 2016 3:00 am

Re: steric and torsional strain

Postby Minu Reddy » Mon Mar 13, 2017 10:14 pm

So is it correct to assume that due to the electron electron repulsion that occurs in the eclipsed conformation, there is always torsional strain ONLY in the eclipsed conformation?

Thank you!


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