Table 2. 1H NMR resonances for the phenolic protons of three regioisomers in CDCl3 .
| H4 L 1,2 | H4 L 1,3 | H4 L 1,4 | |
|---|---|---|---|
| Ar—OH (δ, p.p.m.) | 8.31 (2H) 8.79 (2H) | 8.26 (1H) 7.72 (1H) 7.72 (2H) | 7.75 (4H) |
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