I am aware of the R/S configuration of chiral centers in which the molecule is depicted in dash wedge form.

I wanted to know how the configuration would be mentioned if a chiral center is attached with:

  • two atoms/groups in wedge position
  • one atom at dash position, and
  • only one straight line bond

enter image description here

Hmm, I'm not sure what do you exactly mean by the representation, but I'm guessing that it'd be something similar to the one I've drawn. Such a case is not possible because when we represent something by a wedge/dash configuration we plan to represent a $\text{3D}$ molecule in a $\text{2D}$ drawing sheet of paper.

In reality the chiral molecule with four different groups is $\pu{sp3}$ hybrid, which means that it exists as a tetrahedron. The wedge actually mean that the group points towards you, and the dash means it is going away from you. And by going towards or going away, we mean along a line that's perpendicular to your drawing sheet.

Now that you can't have two groups approaching you perpendicular to the drawing sheet, talking about the configuration makes no sense here.

| improve this answer | |
  • $\begingroup$ I agree with you . And what you've drawn is exactly what i was looking for.. $\endgroup$ – Ankit Agrawal May 20 '17 at 8:02

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