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. Author manuscript; available in PMC: 2020 Nov 6.
Published in final edited form as: J Am Chem Soc. 2019 Oct 28;141(44):17909–17917. doi: 10.1021/jacs.9b09671

Figure 1.

Figure 1.

Partial (a-c) 1H and (d, e) 31P NMR spectra [CD3CN/CD2Cl2 (1:1, v/v), 295 K] of (a) 1a, (b, e) 3a, (c, d) acceptor 2. (f) Experimental (red) and calculated (blue) ESI-TOF-MS spectra of rhomboidal metallacycle 3a [M − 3OTf]3+.