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. Author manuscript; available in PMC: 2019 Jun 20.
Published in final edited form as: J Am Chem Soc. 2018 Jun 12;140(24):7674–7680. doi: 10.1021/jacs.8b03781

Figure 2.

Figure 2.

Partial 1H NMR spectra (400 MHz, CD3COCD3, 295 K) of (a) metallacage 4, (b) a mixture of metallacage 4 and bisammonium salt 5 (1.00 mM 21C7/ammonium salt moieties) and (c) bisammonium salt 5.