| Compound | NH | COO | COO | C=N | M-N | M-O |
| L1 L2 L3 1 2 3 4 5 6 | 3400 - 3373 3424 3362 3390 3481 3444 3365 | 1607 - 1567 1634 1635 1638 1653 1635 1639 | 1495 - 1403 1415 1398 1411 1455 1399 1400 | - 1588 - - 1506 - - 1504 - | - - - 612 562 632 647 615 672 | - - - 580
536 570 537 568 |