Table 2.
Experimental vibrational frequencies for oily vitamin A and the calculated vibration frequencies for vitamin A.
| Calculated ν (cm−1) | Experimental ν (cm−1) | Assigned Vibrations |
|---|---|---|
| 3008 | 3009 | C–H asymmetrical stretching from CH3 groups |
| 2932 | 2953 | C–H asymmetrical stretching from CH3 groups |
| 2910 | 2922 | C–H symmetrical stretching from CH3 groups |
| 2856 | 2853 | C–H symmetrical stretching from CH3 groups |
| 1747 | 1743 | C=O stretching |
| 1466 | 1464 | C–H out of plane bending (wagging) from CH3 groups |
| 1377 | 1377 | C–H out of plane bending (wagging) from CH3 groups |
| 1163 | 1163 | C–H out of plane bending (twisting) from CH3 groups |
| 1025 | 1097 | C–O stretching |