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Annex (Details of NMR spectroscopic analysis) Characterization of DHA # 1H (ppm) 13C (ppm) Type Hs 1 10.40 -- brs 1 2 9.67 3 8.02 4 7.51 5 7.35 6 7.06 7 6.88 8 6.86 9 4.21 500 MHz, DMSO-d6, 25 °C Quaternary Carbons: 182.10, 161.66, 156.13, 144.01, 132.49, 131.33, 123.64 ppm -- brs 1 129.33 d 1 111.27 m 1 129.99 d 1 120.95 d 1 115.39 m 1 113.91 m 1 31.04 s 2 Assignments were made by COSY, HSQC, and HMBC experiments. (Note: on a timescale of hours in DMSO, this compound tautomerizes to its phenolic form.) Characterization of (DHA)2 Dimerization of the DHA monomer with no absolute or relative stereocontrol would result in the following mixture: 28PDF Image | Extending organic flow batteries via redox state management
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