What is eclipsed conformer in Newman projections?

1 Answer
Jun 14, 2015

Answer:

The eclipsed conformer in a Newman projection is the arrangement in which the dihedral angles between the front and back bonds are 0 °.

Explanation:

The bonds on the back carbon are directly behind the bonds on the front carbon.

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In the eclipsed conformation of propane, the #"C-H"# bonds on the back carbon are directly behind the front #"C-H"# bonds. The rear #"C-H"# bonds are "eclipsed" by those in front.

Also, the #"C-CH"_3# bond eclipses the #"C-H"# bond behind it.

We say that the dihedral angle between the front and rear bonds is 0 °.