Skip to main content
. Author manuscript; available in PMC: 2015 Oct 30.
Published in final edited form as: Phys Chem Chem Phys. 2015 Oct 28;17(43):29262–29270. doi: 10.1039/c5cp04668h

Fig 1.

Fig 1

Cations examined in this study. (a) the ammonium ion, (b) the tetramethylammonium ion, and (c) the guanidinium ion. Pictured are molecular structures and potential energy surfaces (Geometry optimized M06/6-31G(d,p) ranging from +400 (red) to +700 (blue) kJ/mol.