Interaction Scheme

Molecule

Tetrabutylammonium squaric acid
Tetrabutylammonium squaric acid

Host

2 n 2 n' 8 n 8 n' tetrapropyl 1 3 4 6 7 9 hexahydropyrimido 1 2 a pyrimidin 5 ium 2 2 8 8 tetracarboxamide iodide
tetracarboxamide-bicyclic guanidinium iodide

Binding Properties

𝜈 Molecule 1 : 1 Host
Ka = 2.88⋅107 M-1
Kd =
logKa = 7.46
T 19.85 °C 293 K
Energy kJ mol-1 kcal mol-1
ΔG = -41.84 -10.0
ΔH = -11.7 -2.8
-TΔS = -30.21 -7.22
J mol-1 K-1 cal mol-1 K-1
ΔS = 103.1 24.6
These are the specifications of the determination of the experimental results.
Detection Method: Direct
Assay Type: Direct Binding Assay
Technique: Isothermal Titration Calorimetry
Molecule: syringe
Partner: syringe
Detailed information about the solvation.
Solvent System Single Solvent
Solvent acetonitrile
Please find here information about the dataset this interaction is part of.
Citation:

V. D. Jadhav, F. P. Schmidtchen, SupraBank 2024, Surprises in the Design of Anion Receptors:  Calorimetry Prevents False Reasoning (dataset). https://doi.org/10.34804/supra.2021092841

Link: https://doi.org/10.34804/supra.2021092841
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Please find here information about the scholarly article describing the results derived from that data.
Citation:

V. D. Jadhav, F. P. Schmidtchen, Org. Lett. 2005, 7, 3311–3314.

Link: https://doi.org/10.1021/ol051109k
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Binding Isotherm Simulations


The plot depicts the binding isotherm simulation of a 1:1 interaction of Tetrabutylammonium squaric acid (6.944444444444445e-07 M) and tetracarboxamide-bicyclic guanidinium iodide (0 — 1.388888888888889e-06 M).