Key points are not available for this paper at this time.
A remarkable selectivity on the basis of size is observed for the encapsulation of Et4N+ in the presence of Me4N+ and Pr4N+ by a predesigned Ga4L612− homochiral tetrahedral cluster (L=bis-bidentate ligand). Immediate and quantitative stepwise replacement of R4N+ counterions in the cluster cavity is observed by 1H NMR spectroscopy (see below). The encapsulation of Et4N+ is also observed in the solid state.
Caulder et al. (1998) studied this question.