Table 8.

Two series of binding constants for different guests to CB[7] (131c).

Guest	Competitor	Kass/M−1
S-Phe (81a)	none	(1.8 ± 0.2) × 106
1,6-hexanediamine	S-Phe (81a)	(2.1 ± 0.4) × 109
aminocyclohexane	1,6-hexanediamine	(1.3 ± 0.4) × 1011
142c	aminocyclohexane	(3.0 ± 1.0) × 1015
cyclopentanone	none	(4.2 ± 0.3) × 105
spermine (133)	cyclopentanone	(4.8 ± 0.6) × 108
N,N′-bis(aminoethyl)-1,6-hexanediamine	spermine (133)	(1.7 ± 0.4) × 1011
142c	N,N’-bis(aminoethyl)-1,6-hexanediamine	(3.3 ± 1.0) × 1015