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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 1.

Figure 1.

31P {1H} NMR spectra (121.4 MHz, CD3COCD3, 295 K) of (a) 2 and (b) 4. (c) Experimental (red) and calculated (blue) ESI-TOF-MS spectra of metallacage 4: [4 – 5OTf]5+. Partial 1H NMR spectra (400 MHz, CD3COCD3, 295 K) of (d) TPE derivative 1, (e) metallacage 4 and (f) dipyridyl ligand 3.