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0346923871
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3 symmetric receptors is ongoing and will be reported in due course
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3 symmetric receptors is ongoing and will be reported in due course.
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19
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0011941216
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For recent selected examples on the use of other benzene-based tripodal ligands in molecular recognition, metal complexation, and self-assembly, see: a) C. M. Hartshorn, P. J. Steel, Angew. Chem. 1996, 108, 2818-2820; Angew. Chem. Int. Ed. Engl. 1996, 35, 2655-2657;
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For recent selected examples on the use of other benzene-based tripodal ligands in molecular recognition, metal complexation, and self-assembly, see: a) C. M. Hartshorn, P. J. Steel, Angew. Chem. 1996, 108, 2818-2820; Angew. Chem. Int. Ed. Engl. 1996, 35, 2655-2657;
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Because of lack of data, the affinity can not be compared; however, tris(oxazoline) 8 is believed to be the most strong receptor toward alkylammonium ions in which only weak binding forces interplay. This unusual affinity is attributed to the ideal tripodal hydrogen bonding, cation-π interactions, and hydrophobic effects
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Because of lack of data, the affinity can not be compared; however, tris(oxazoline) 8 is believed to be the most strong receptor toward alkylammonium ions in which only weak binding forces interplay. This unusual affinity is attributed to the ideal tripodal hydrogen bonding, cation-π interactions, and hydrophobic effects.
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36
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0348184493
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note
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Kα radiation, 9582 reflections collected, 5795 independent reflections, R1 = 0.0461, wR2 = 0.0921 [I > 2σ(I)], R1 = 0.0594, wR2 = 0.1013 (all data), GOF = 1.136. Crystallographic data (excluding structure factors) for the structure reported in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication no. CCDC-147263. Copies of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge CB21EZ, UK (fax: (+44)1223-336-033; e-mail: deposit@ccdc.cam. ac.uk).
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37
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4243468938
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An ab initio calculation is carried out by colleagues and will be reported independently. For a recent review on the cations-π interactions, see: J. C. Ma, D. A. Dougherty, Chem. Rev. 1997, 97, 1303-1324.
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Ma, J.C.1
Dougherty, D.A.2
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38
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0033575116
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1H-NMR shifts of the benzene or benzylic protons has not reported yet. For an interesting case where a down-field shift is observed in a presumed cation-π interaction system, see: S. L. De Wall, E. S. Meadows, L. J. Barbour, G. W. Gokel, J. Am. Chem. Soc. 1999, 121, 5613-5614.
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De Wall, S.L.1
Meadows, E.S.2
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Gokel, G.W.4
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