Fig. 6: The DFT investigation on the enantioselectivity of the [10 + 2] annulation.
From: N-Heterocyclic carbene-catalyzed enantioselective hetero-[10 + 2] annulation
![Fig. 6: The DFT investigation on the enantioselectivity of the [10 + 2] annulation.](http://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs42004-020-00425-7/MediaObjects/42004_2020_425_Fig6_HTML.png?as=webp)
a The two transition states of TS(II–III)R and TS(II–III)S Gibbs free energy barriers and distortion energies comparing. b NCI analysis of the TS(II–III)R and TS(II–III)S. c The IRC of transition state TS(II)R.
