Ignoring whether or not this molecule could exist, is there a name for this type of chirality? This molecule's mirror image cannot be superimposed on itself but there are no chiral centres.

Chiral boron compound

Even though the bottom boron only has three substituents, the fact that they are all joined at the top gives it similar geometrical properties as if it were tetrahedral.

The InchI is InChI=1S/C4H8B2OS/c1-2-6-7-3-5(1)4-8-6/h1-4H2

  • $\begingroup$ Could it be an example of Axial Chirality? Where the axis is through the boron atoms? $\endgroup$
    – user137
    Commented Sep 15, 2020 at 15:18
  • $\begingroup$ how would boron exist in bridge head position? Is there a point in discussing chirality for something that may not even exist? $\endgroup$ Commented Sep 15, 2020 at 15:20
  • $\begingroup$ @safdar I'm sure you could substitute the atoms for something that could exist instead. I chose boron instead of carbon because trigonal planar atoms are inherently not stereocenters. The geometry is what matters. $\endgroup$
    – hazza_h
    Commented Sep 15, 2020 at 15:27
  • $\begingroup$ Something like this? chemistry.stackexchange.com/questions/136695/… $\endgroup$ Commented Sep 15, 2020 at 15:54
  • $\begingroup$ This atom's environment wouldn't be trigonal planar - pyramidalisation with ring strain. Still it's planar chirality. $\endgroup$
    – Mithoron
    Commented Sep 15, 2020 at 16:08


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