Research Article
Preparation and Characterization of Di-, Tri-, and Tetranuclear Schiff Base Complexes Derived from Diamines and 3,4-Dihydroxybenzaldehyde
Table 4
Chemical shifts (ppm) for 13C NMR of Schiff bases EDH4 and MPDH4 in DMSO.
| Compound | Chemical shifts (ppm) | Assignments |
| EDH4 | 60.99 | Carbon of CH2 | 113.6–161.2 | Aromatic carbons | 167.2 | Carbon of HC=N |
| MPDH4 | 19.8, 20.1 | Carbon of methyl group | 110.8–146.8 | Aromatic carbons | 150.6, 152.7 | Carbon of HC=N |
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