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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
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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.

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  • $\begingroup$ I agree with you . And what you've drawn is exactly what i was looking for.. $\endgroup$
    – Ankit Agrawal
    May 20, 2017 at 8:02

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