Host-Guest Complexations of Amine Boranes and Isoelectronic/Isostructural Quaternary Alkylammonium Cations by Cucurbit[7]uril in Aqueous Solution

Figure 5

Plot of log() against the packing coefficient for the CB complexes of the (blue circle) amine boranes and (red circle) isostructural alkylammonium cations from this study, (black triangle) peralkylated onium cations [27, 28], (black square) n-alkanes [35], (empty triangle) ketones [34], (empty square) bicyclic azoalkanes [31], and (empty down triangle) perfluorinated alkanes and alcohols [32]. The horizontal line represents Mecozzi and Rebek’s optimal packing coefficient of 55 ± 9 % [30].