. 2017 Dec 27;2(12):9231–9240. doi: 10.1021/acsomega.7b01434
Copyright © 2017 American Chemical Society
This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Figure 1.
Frontier orbitals of Y1, Y2, and Y3.