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. Author manuscript; available in PMC: 2014 Aug 21.
Published in final edited form as: Chem Commun (Camb). 2013 Jul 10;49(65):7240–7242. doi: 10.1039/c3cc44574g

Table 1.

Anion association constants (Ka) obtained by fitting titration data using MatLab for 1H NMR data or Hyperquad for UV-Vis data.a

Host Cl/M–1 Cl ΔG/kcal mol–1 Br/M–1 I/M–1
2 700b –3.88
5 6700c –5.21 1600b 150b
3 40700c –6.28
a

Anions added as tetrabutylammonium salts in water-saturated CHCl3 or CDCl3 at 298 K. Error is ca. ±10% and the values represent an average of three titrations.

b

Titrations performed using 1H NMR.

c

Titrations performed using UV-Vis.