Unusual conformational control of mobile mono- and diionizable calix[4]arene ligands by alkali metal cations

Vladimir S. Talanov,* Hong-Sik Hwang and Richard A. Bartsch

Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061 USA

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1NMR spectra (aromatic region) for (a) L1H2, (b) L1Li2, (c) L1Na2 (499.7 MHz, CDCl3, 296K).

1NMR spectra (aromatic region) for (a) L1K2, (b) L1Rb2, (c) L1Cs2 (499.7 MHz, CDCl3, 296K).

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Partial 1NMR spectra for (a) L1H2, (b) L1Li2, (c) L1Na2 (499.7 MHz, CDCl3, 296K).

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Partial 1NMR spectra for (a) L1K2, (b) L1Rb2, (c) L1Cs2 (499.7 MHz, CDCl3, 296K).

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NOESY spectrum for L6Cs in CDCl3 (499.7 MHz, 296K). * Identifies signals of ArCH2Ar protons, identifies signal of OCH2CO protons; cross-peaks of interest are indicated by arrows.

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