Dimerization of a guanidiniocarbonyl pyrrole cation in DMSO that can be controlled by the counteranion.
In the presence of chloride anions cation 1 dimerizes in DMSO with a surprisingly high association constant of > 10(3) M(-1) whereas the addition of picrate disrupts these dimers by formation of even more stable discrete pi-stacked ion pairs.
Institut fur Organische Chemie, Universitat Wurzburg, Am Hubland, 97074 Wurzburg, Germany. schmuck@chemie.uni-wuerzburg.de
Carsten
C
Schmuck
Lars
L
Geiger