An extremely stable interwoven supramolecular bundle

Organic Letters

Volumn 2, Issue 9, 2000, Pages 1221-1224

  Fyfe, Matthew C T ^a   Lowe, James N ^a   Stoddart, J Fraser ^a   Williams, David J ^b  

^a UNIVERSITY OF CALIFORNIA   (United States)

^b IMPERIAL COLLEGE LONDON   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001726414     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol0056473     Document Type: Article

References (33)

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15. Originally (ref 3a), we referred to these supermolecules as "interwoven supramolecular cages". However, after some reflection, we have now decided to call them "interwoven supramolecular bundles" to indicate that they do not necessarily possess internal voids that can accommodate guests.
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20. We have advocated (Fyfe, M. C. T.; Glink, P. T.; Menzer, S.; Stoddart, J. F.; White, A. J. P.; Williams, D. J. Angew. Chem., Int. Ed. Engl. 1997, 36, 2068-2070) the use of the term co-conformation to designate the different three-dimensional spatial arrangements of (a) the constituent parts of supramolecular systems and (b) the components of interlocked molecular systems.
21. Bisson, A. P.; Hunter, C. A. Chem. Commun. 1996, 1723-1724.
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25. - anions are also disordered: two full and one-half anions lie in general position the remainder in a special position. Where possible, the disorder was resolved into partial occupancy alternative orientations. Otherwise, it was compensated for by allowing large anisotropic thermal parameters. Constrained geometries were used throughout the disordered regions. The mixed overlapping solvent fragments could not be resolved. Computations were carried out using the SHELXTL program package version 5.03.
26. Hwang, T.-L.; Shaka, A. J. J. Am. Chem. Soc. 1992, 114, 3157-3159.
27. 1H NMR time scale with its free components at room temperature. See: Ashton, P. R.; Chrystal, E. J. T.; Glink, P. T.; Menzer, S.; Schiavo, C.; Spencer, N.; Stoddart, J. F.; Tasker, P. A.; White, A. J. P.; Williams, D. J. Chem. Eur. J. 1996, 2, 709-728.
28. 6 and 2.
29. + cation (which are in slow exchange) resonate at δ 2.19 and 2.35. respectively. See: Ashton, P. R.; Fyfe, M. C. T.; Hickingbottom, S. K.; Stoddart, J. F.; White, A. J. P.; Williams, D. J. J. Chem. Soc., Perkin Trans. 2 1998, 2117-2128.
30. Resonances B and D can be assigned speculatively. Since resonance B, in general, has a greater intensity than that of D. then resonance B probably corresponds to the uncomplexed methyl protons in the singly threaded species leaving resonance D to correspond to the uncomplexed methyl protons in the doubly threaded species.
31. +/DB24C8 recognition motif. See: Meillon, J.-C.; Voyer, N.; Biron, E.; Sanschagrin, F.; Stoddart, J. F. Angew. Chem., Int. Ed. 2000, 39, 143-145.
32. +/DB24C8 recognition motif, see (a) Yamaguchi, N.; Gibson, H. W. Anqew. Chem., Int. Ed. 1999, 38, 143-147.
33. (b) Yamaguchi, N.; Gibson, H. W. Chem. Commun. 1999, 789-790.