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| band (cm–1) | PIn | band (cm–1) | Gr@PIn (Gr1@PIn and Gr3@PIn) |
|---|---|---|---|
| 627 | –C–H (bending) | ||
| 744 | –C–H (bending) | 744 | –C–H (bending) |
| 1111 | –C–N (bending) | 1118 | –C–N (bending) |
| 1383 | –C=N (stretching) | 1375 | –C=N (stretching) |
| 1450 | –C–N (stretching) | 1455 | –C–N (stretching) |
| 1616 | –C=C (stretching) | 1604 | –C=C (stretching) |
| 3350 | –N–H (stretching) | 3350 | –N–H (stretching) |
