| Symbol | NH of amide (isatin) | C=O of C2-isatin | C=O B-lactam (Amide + ester) | C=N | -COO Asym. (sym) | H2O Lattice (coordinate) | M-O-COO (H2O) | M-N (M-Cl) |
| LI | 3255 (3192) | 1692 | 1740 (1659) | 1636 | 1568 (1367) | - | - | - |
| C2 Ni(II) | 3252 (3194) | 1694 | 1726 (1658) | 1626 | 1611 (1385) | 3525 (3370, 806, 768) | 493 (462) | 424 (336) |
| C1 Co(II) | 3253 (3194) | 1695 | 1728 (1659) | 1625 | 1625 (1385) overlap | 3525 (3370, 806, 752) | 509 (486) | 420 (370) |
| C3 Cu(II) | 3253 (3193) | 1693 | 1725 (1661) | 1624 | 1624 overlap (1377) | 3525 (3375, 806, 768) | 486 (455) | 424 (370) |
| C4 Cd(II) | 3257 (3194) | 1695 | 1729 (1655) | 1624 | 1578 (1377) | 3520 (3400, 802, 768) | 579 (556) | 440 (348) |
| C5 Pd(II) | 3255 (3190) | 1695 | 1730 (1658) | 1628 | 1557 (1356) | 3525 | 553 (536) | 417 (336) |
| C6 Pt(IV) | 3258 (3194) | 1693 | 1725 (1659) | 1626 | 1626 overlap (1404) | 3464 | 556 (517) | 451 (374) |