Table 1. Chemical Shift Assignment from 1H-NMR Spectra.
| head-to-head (diaryl)/tail-to-tail (dialkyl) |
head-to-tail (aryl
alkyl) |
||
|---|---|---|---|
| proton | chemical shift [ppm] | proton | chemical shift [ppm] |
| a1 (aryl, Ty) | 7.3(m) | a2 (aryl, Ty) | 7.3 (m) |
| a1 (aryl, Hva) | 7.1(m) | a2 (aryl, Hva) | 7.1 (m) |
| b1 (aryl) | 7.3 (m) | b2 (aryl) | 7.1 (m) |
| c1 (aryl, Hva) | 6.9, 6.8 (m) | c2 (aryl, Hva) | 6.7, 6.8 (m) |
| d1 (alkyl) | 2.9 (m) | d2 (alkyl) | 3.0 (m) |
| e1 (alkyl) | 4.3 (m) | e2 (alkyl) | 4.4 (m) |
| f1 (methoxy, Hva) | 3.8 (s, s) | f2 (methoxy, Hva) | 3.7 (s, s) |
s = singlet, m = multiplet.