Fig. 4. The upper part of the image is the 3D potential energy surface (PES) of the [N(Tf)2]− anion and the lower surface the 2D projection. Plus symbols mark selected transition states. The arrows indicate how a local minimum and maximum are mapped on the 2D projection. The bold line at 15 kJ mol−1 will facilitate comparison with other surfaces. The lowest energy conformer is taken as zero reference.
