TABLE 1.
1H NMR data of NPM, NEM, NPMA, and NEMA in D2O at 400 MHz
| Assignment | No. of protons, chemical shifts (δ, ppm), multiplicity and coupling constant (J, Hz)a for:
|
|||
|---|---|---|---|---|
| NPM | NEM | NPMA | NEMA | |
| Ha | 2H, 7.10, s | 2H, 6.64, s | 1H, 6.28, d, 12.4 Hz | 1H, 6.13, d, 12.4 Hz |
| Hb | 1H, 5.93, d, 12.4 Hz | 1H, 5.75, d, 12.4 Hz | ||
| ArH | 5H, 7.25–7.45, m | 1H, 7.07–7.10, m 4H, 7.25–7.35, m | ||
| -CH2 | 2H, 3.54, q, 7.2 Hz | 2H, 3.06, q, 7.2 Hz | ||
| -CH3 | 3H, 1.15, t, 7.2 Hz | 3H, 0.95, t, 7.2 Hz | ||
a
Spectrum in DMSO-d6: nH = number of protons, where n is a number between 1 and 5; the chemical shift (δ) is shown in ppm; s = singlet, d = doublet, t = triplet, q = quartet, m = multiplet of peaks on the NMR spectrum, and J (Hz) is the coupling constant between these peaks.