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. Author manuscript; available in PMC: 2015 Oct 13.
Published in final edited form as: J Am Chem Soc. 2015 Jun 9;137(23):7310–7313. doi: 10.1021/jacs.5b04738

Figure 2.

Figure 2

Crystal structure of {8}{Na(12-crown-4)2}. The countercation (Na(12-crown-4)2), solvent molecules, and hydrogen atoms are omitted for clarity. Thermal ellipsoids shown at 50% probability.