Table 4.
Chemical shifts and assignment of 1H-NMR resonances of BB seed oil [61].
| No. | δ (ppm) | Proton | Compound |
|---|---|---|---|
| 1 | 0.85 | –CH2–CH2–CH2–CH3 | all acids except linolenic acid |
| 2 | 0.85 | –CH=CH–CH2-CH3 | linolenic acid |
| 3 | 1.24 | –(CH2)n- | all fatty acids |
| 4 | 1.64 | –CH2–CH2–COO– | all fatty acids |
| 5 | 2.02 | –CH2–CH=CH– | allylic acids (from all unsaturated fatty acids) |
| 6 | 2.26 | –CH2–COO– | all fatty acids |
| 7 | 2.76 | –CH = CH–CH2–CH=CH– | bis-allylic protons (from linolenic and linoleic acid) |
| 8 | 3.60 | –COO–CH3 | methyl ester moiety |
| 9 | 4.19 | –CH2OCOR | H in the sn-1/3 position of the glycerol backbone |
| 10 | 5.20 | –CHOCOR | H in the sn-2 position of the glycerol backbone |
| 11 | 5.29 | –CH=CH- | all unsaturated fatty acids |