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1 article(s) from Pietrzak, Marek

Conformational equilibrium in supramolecular chemistry: Dibutyltriuret case

Karina Mroczyńska,
Małgorzata Kaczorowska,
Erkki Kolehmainen,
Ireneusz Grubecki,
Marek Pietrzak and
Borys Ośmiałowski

Beilstein J. Org. Chem. 2015, 11, 2105–2116, doi:10.3762/bjoc.11.227

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Graphical Abstract

Figure 1: The compounds used in this study and their atom numbering.

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Figure 2: Possible conformations of 1.

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Figure 3: Driving forces influencing association exemplified on two "extreme" conformations of 1∙∙∙benzoate.

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Figure 4: Two possible, extreme multiple hydrogen bonded multimeric structures of 1 and VT ¹H NMR spectra (fr...

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Figure 5: The proposed structure explaining unusual behavior of the titration curve for 1∙∙∙9 titration and a...

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Figure 6: Collective titration curves (H1/H7 and H3/H5 chemical shifts, CDCl₃) for complex of 1 with substitu...

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Figure 7: The signal labelling for [1]:[5] in 1:1 ratio exemplified on the spectra recorded at −40 °C (CDCl₃)...

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Figure 8: The variable temperature (+20 to −40 °C, CDCl₃) dependence of the main signals (the highest integra...

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Figure 9: The VT (+20 to −70 °C, CDCl₃) ¹H NMR stacked spectra (low temp. at bottom) for 1∙∙∙10 in 1:0.1 mola...

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Figure 10: Two most probable forms of 1∙∙∙10 complex (in red) with "rotational-shift" path between them.

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Published 05 Nov 2015

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